feat(backend): Replace Node.js API with .NET 8

This commit completes the migration of the backend service from a Node.js/Express application to an ASP.NET Core 8 Minimal API. - Re-implemented all API endpoints in C# for improved performance and type safety. - Updated the Gitea Actions workflow to use the `setup-dotnet` action, `dotnet publish` for building, and now caches NuGet packages. - Modified the deployment to create an `appsettings.Production.json` file from Gitea secrets instead of a `.env` file. - Updated the PM2 ecosystem configuration to run the application using the `dotnet` interpreter.
2025-10-29 19:14:20 -03:00
parent f14e298c46
commit 40fd792be1
30 changed files with 1017 additions and 1077 deletions
--- a/backend/.dockerignore
+++ b/backend/.dockerignore
@@ -0,0 +1,30 @@
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/azds.yaml
+**/bin
+**/charts
+**/docker-compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+LICENSE
+README.md
+!**/.gitignore
+!.git/HEAD
+!.git/config
+!.git/packed-refs
+!.git/refs/heads/**
--- a/backend/JoaoLoureiro.Portfolio.Api/Dockerfile
+++ b/backend/JoaoLoureiro.Portfolio.Api/Dockerfile
@@ -0,0 +1,36 @@
+# Stage 1: Build the application
+# Use the .NET SDK image which contains all the tools to build and publish
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+WORKDIR /src
+
+# Copy all .csproj files and the .sln file first. This is a key optimization.
+# Docker will cache this layer, and will only re-run `dotnet restore` if a project file changes.
+COPY ["JoaoLoureiro.Portfolio.Core/JoaoLoureiro.Portfolio.Core.csproj", "JoaoLoureiro.Portfolio.Core/"]
+COPY ["JoaoLoureiro.Portfolio.Infrastructure/JoaoLoureiro.Portfolio.Infrastructure.csproj", "JoaoLoureiro.Portfolio.Infrastructure/"]
+COPY ["JoaoLoureiro.Portfolio.Api/JoaoLoureiro.Portfolio.Api.csproj", "JoaoLoureiro.Portfolio.Api/"]
+COPY ["JoaoLoureiro.Portfolio.sln", "."]
+
+# Restore all NuGet packages for the entire solution
+RUN dotnet restore "JoaoLoureiro.Portfolio.sln"
+
+# Copy the rest of the source code
+COPY . .
+
+# Publish the API project, creating the release-ready artifacts
+WORKDIR "JoaoLoureiro.Portfolio.Api"
+RUN dotnet publish "JoaoLoureiro.Portfolio.Api.csproj" -c Release -o /app/publish --no-restore
+
+# Stage 2: Create the final, minimal runtime image
+# Use the lightweight ASP.NET runtime image, which is much smaller than the SDK
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS final
+WORKDIR /app
+
+# The new .NET 8 images run as a non-root 'app' user by default for better security.
+# We expose port 8080, as the default internal port 80 is often a privileged port.
+EXPOSE 8080
+
+# Copy the published output from the build stage
+COPY --from=build /app/publish .
+
+# Set the entrypoint for the container
+ENTRYPOINT ["dotnet", "JoaoLoureiro.Portfolio.Api.dll"]
--- a/backend/JoaoLoureiro.Portfolio.Api/Dtos/ContactMessageRequest.cs
+++ b/backend/JoaoLoureiro.Portfolio.Api/Dtos/ContactMessageRequest.cs
@@ -0,0 +1,8 @@
+namespace JoaoLoureiro.Portfolio.Api.Dtos;
+
+public class ContactMessageRequest
+{
+    public required string Name { get; set; }
+    public required string Email { get; set; }
+    public required string Message { get; set; }
+}
--- a/backend/JoaoLoureiro.Portfolio.Api/JoaoLoureiro.Portfolio.Api.csproj
+++ b/backend/JoaoLoureiro.Portfolio.Api/JoaoLoureiro.Portfolio.Api.csproj
@@ -0,0 +1,34 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>13f24551-c620-43ab-9c94-073e5617c79d</UserSecretsId>
+    <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Remove="Controllers\**" />
+    <Content Remove="Controllers\**" />
+    <EmbeddedResource Remove="Controllers\**" />
+    <None Remove="Controllers\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AspNetCore.HealthChecks.System" Version="9.0.0" />
+    <PackageReference Include="AspNetCore.HealthChecks.UI.Client" Version="9.0.0" />
+    <PackageReference Include="AutoMapper" Version="15.0.1" />
+    <PackageReference Include="FluentValidation.AspNetCore" Version="11.3.1" />
+    <PackageReference Include="MailKit" Version="4.13.0" />
+    <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.23.0-preview.4" />
+    <PackageReference Include="Serilog.AspNetCore" Version="9.0.0" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\JoaoLoureiro.Portfolio.Application\JoaoLoureiro.Portfolio.Core.csproj" />
+    <ProjectReference Include="..\JoaoLoureiro.Portfolio.Infrastructure\JoaoLoureiro.Portfolio.Infrastructure.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/backend/JoaoLoureiro.Portfolio.Api/JoaoLoureiro.Portfolio.Api.http
+++ b/backend/JoaoLoureiro.Portfolio.Api/JoaoLoureiro.Portfolio.Api.http
@@ -0,0 +1,6 @@
+@JoaoLoureiro.Portfolio.Api_HostAddress = http://localhost:5125
+
+GET {{JoaoLoureiro.Portfolio.Api_HostAddress}}/weatherforecast/
+Accept: application/json
+
+###
--- a/backend/JoaoLoureiro.Portfolio.Api/Mapping/MappingProfile.cs
+++ b/backend/JoaoLoureiro.Portfolio.Api/Mapping/MappingProfile.cs
@@ -0,0 +1,15 @@
+using AutoMapper;
+using JoaoLoureiro.Portfolio.Api.Dtos;
+using JoaoLoureiro.Portfolio.Core.Models;
+
+namespace JoaoLoureiro.Portfolio.Api.Mapping;
+
+public class MappingProfile : Profile
+{
+    public MappingProfile() {
+        CreateMap<ContactMessageRequest, EmailToSend>()
+        .ForMember(dest => dest.SenderName, opt => opt.MapFrom(src => src.Name))
+        .ForMember(dest => dest.ReplyToEmail, opt => opt.MapFrom(src => src.Email))
+        .ForMember(dest => dest.MessageBody, opt => opt.MapFrom(src => src.Message));
+    }
+}
--- a/backend/JoaoLoureiro.Portfolio.Api/Program.cs
+++ b/backend/JoaoLoureiro.Portfolio.Api/Program.cs
@@ -0,0 +1,122 @@
+using AutoMapper;
+using FluentValidation;
+using HealthChecks.UI.Client;
+using JoaoLoureiro.Portfolio.Api.Dtos;
+using JoaoLoureiro.Portfolio.Core.Interfaces;
+using JoaoLoureiro.Portfolio.Core.Models;
+using JoaoLoureiro.Portfolio.Infrastructure.HealthCheck;
+using JoaoLoureiro.Portfolio.Infrastructure.Services;
+using JoaoLoureiro.Portfolio.Infrastructure.Settings;
+using Microsoft.AspNetCore.Diagnostics.HealthChecks;
+using Microsoft.AspNetCore.HttpOverrides;
+using Microsoft.AspNetCore.Mvc;
+using Serilog;
+using System.Net;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.Host.UseSerilog((context, config) => config.ReadFrom.Configuration(context.Configuration));
+
+builder.Services.AddProblemDetails();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+var corsOrigins = builder.Configuration["CorsOrigins"];
+builder.Services.AddCors(options =>
+{
+    options.AddDefaultPolicy(policy =>
+    {
+        if (corsOrigins is not null)
+        {
+            policy.WithOrigins(corsOrigins.Split(','))
+                  .AllowAnyHeader()
+                  .AllowAnyMethod();
+        }
+    });
+});
+
+builder.Services.AddOptions<SmtpSettings>()
+    .Bind(builder.Configuration.GetSection("SmtpSettings"))
+    .ValidateDataAnnotations()
+    .ValidateOnStart();
+
+builder.Services.AddScoped<IEmailSender, SmtpEmailSender>();
+builder.Services.AddValidatorsFromAssemblyContaining<Program>();
+
+builder.Services.AddAutoMapper(cfg => { }, typeof(Program));
+builder.Services.AddHealthChecks()
+    .AddCheck<SmtpHealthCheck>("SMTP");
+
+builder.Services.Configure<ForwardedHeadersOptions>(options =>
+{
+    options.KnownProxies.Add(IPAddress.Parse(builder.Configuration["ProxyIP"] ?? "10.0.10.10"));
+});
+
+var app = builder.Build();
+
+app.UseForwardedHeaders(new ForwardedHeadersOptions
+{
+    ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
+});
+
+app.UseSerilogRequestLogging();
+app.UseExceptionHandler();
+app.UseStatusCodePages();
+
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseHttpsRedirection();
+app.UseCors();
+
+
+app.MapHealthChecks("/health", new HealthCheckOptions
+{
+    ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
+});
+
+app.MapPost("/api/email/send", async (
+    [FromBody] ContactMessageRequest request,
+    IValidator<ContactMessageRequest> validator,
+    IEmailSender emailSender,
+    IMapper mapper,
+    ILogger<Program> logger,
+    CancellationToken cancellationToken) =>
+{
+    var validationResult = await validator.ValidateAsync(request, cancellationToken);
+    if (!validationResult.IsValid)
+    {
+        var error = validationResult.Errors.First();
+        return Results.BadRequest(new { errorKey = error.ErrorCode });
+    }
+
+    try
+    {
+        var email = mapper.Map<EmailToSend>(request);
+
+        await emailSender.SendEmailAsync(email, cancellationToken);
+
+        return Results.Ok(new { message = "Message sent successfully!" });
+    }
+    catch (Exception ex)
+    {
+        logger.LogError(ex, "An unexpected error occurred while sending email.");
+        return Results.Problem(
+            detail: "An unexpected error occurred on the server.",
+            statusCode: 500,
+            title: "Server Error",
+            extensions: new Dictionary<string, object?> { { "errorKey", "server_unexpected_error" } }
+        );
+    }
+})
+.WithName("SendContactMessage")
+.WithDescription("Accepts a contact form submission and sends it as an email.")
+.Produces(StatusCodes.Status200OK)
+.Produces<HttpValidationProblemDetails>(StatusCodes.Status400BadRequest)
+.Produces<ProblemDetails>(StatusCodes.Status500InternalServerError);
+
+
+app.Run();
--- a/backend/JoaoLoureiro.Portfolio.Api/Properties/launchSettings.json
+++ b/backend/JoaoLoureiro.Portfolio.Api/Properties/launchSettings.json
@@ -0,0 +1,52 @@
+{
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "http://localhost:5125"
+    },
+    "https": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true,
+      "applicationUrl": "https://localhost:7153;http://localhost:5125"
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "Container (Dockerfile)": {
+      "commandName": "Docker",
+      "launchBrowser": true,
+      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/swagger",
+      "environmentVariables": {
+        "ASPNETCORE_HTTPS_PORTS": "8081",
+        "ASPNETCORE_HTTP_PORTS": "8080"
+      },
+      "publishAllPorts": true,
+      "useSSL": true
+    }
+  },
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:36910",
+      "sslPort": 44372
+    }
+  }
+}
--- a/backend/JoaoLoureiro.Portfolio.Api/Validators/ContactMessageRequestValidator.cs
+++ b/backend/JoaoLoureiro.Portfolio.Api/Validators/ContactMessageRequestValidator.cs
@@ -0,0 +1,16 @@
+using FluentValidation;
+using JoaoLoureiro.Portfolio.Api.Dtos;
+
+namespace JoaoLoureiro.Portfolio.Api.Validators;
+
+public class ContactMessageRequestValidator : AbstractValidator<ContactMessageRequest>
+{
+    public ContactMessageRequestValidator()
+    {
+        RuleFor(x => x.Name).NotEmpty().WithErrorCode("status_error_all_fields");
+        RuleFor(x => x.Message).NotEmpty().WithErrorCode("status_error_all_fields");
+        RuleFor(x => x.Email)
+            .NotEmpty().WithErrorCode("status_error_all_fields")
+            .EmailAddress().WithErrorCode("status_error_invalid_email");
+    }
+}
--- a/backend/JoaoLoureiro.Portfolio.Api/appsettings.json
+++ b/backend/JoaoLoureiro.Portfolio.Api/appsettings.json
@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}
--- a/backend/JoaoLoureiro.Portfolio.Application/Interfaces/IEmailSender.cs
+++ b/backend/JoaoLoureiro.Portfolio.Application/Interfaces/IEmailSender.cs
@@ -0,0 +1,8 @@
+using JoaoLoureiro.Portfolio.Core.Models;
+
+namespace JoaoLoureiro.Portfolio.Core.Interfaces;
+
+public interface IEmailSender
+{
+    Task SendEmailAsync(EmailToSend email, CancellationToken cancellationToken = default);
+}
--- a/backend/JoaoLoureiro.Portfolio.Application/JoaoLoureiro.Portfolio.Core.csproj
+++ b/backend/JoaoLoureiro.Portfolio.Application/JoaoLoureiro.Portfolio.Core.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
--- a/backend/JoaoLoureiro.Portfolio.Application/Models/EmailToSend.cs
+++ b/backend/JoaoLoureiro.Portfolio.Application/Models/EmailToSend.cs
@@ -0,0 +1,8 @@
+namespace JoaoLoureiro.Portfolio.Core.Models;
+
+public class EmailToSend
+{
+    public required string SenderName { get; set; }
+    public required string ReplyToEmail { get; set; }
+    public required string MessageBody { get; set; }
+}
--- a/backend/JoaoLoureiro.Portfolio.Domain/Entities/ContactMessage.cs
+++ b/backend/JoaoLoureiro.Portfolio.Domain/Entities/ContactMessage.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace JoaoLoureiro.Portfolio.Domain.Entities
+{
+    public class ContactMessage(string name, Email replyToEmail, string message)
+    {
+        public string Name { get; private set; } = name;
+        public Email ReplyToEmail { get; private set; } = replyToEmail;
+        public string Message { get; private set; } = message;
+    }
+}
--- a/backend/JoaoLoureiro.Portfolio.Domain/Entities/Email.cs
+++ b/backend/JoaoLoureiro.Portfolio.Domain/Entities/Email.cs
@@ -0,0 +1,4 @@
+namespace JoaoLoureiro.Portfolio.Domain.Entities;
+
+public record Email(string Address);
+
--- a/backend/JoaoLoureiro.Portfolio.Domain/JoaoLoureiro.Portfolio.Domain.csproj
+++ b/backend/JoaoLoureiro.Portfolio.Domain/JoaoLoureiro.Portfolio.Domain.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
--- a/backend/JoaoLoureiro.Portfolio.Infrastructure/HealthCheck/SmtpHealthCheck.cs
+++ b/backend/JoaoLoureiro.Portfolio.Infrastructure/HealthCheck/SmtpHealthCheck.cs
@@ -0,0 +1,31 @@
+
+using JoaoLoureiro.Portfolio.Infrastructure.Settings;
+using MailKit.Net.Smtp;
+using MailKit.Security;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using Microsoft.Extensions.Options;
+
+namespace JoaoLoureiro.Portfolio.Infrastructure.HealthCheck;
+
+public class SmtpHealthCheck(IOptions<SmtpSettings> smtpSettings) : IHealthCheck
+{
+    private readonly SmtpSettings _smtpSettings = smtpSettings.Value;
+
+    public async Task<HealthCheckResult> CheckHealthAsync(
+        HealthCheckContext context,
+        CancellationToken cancellationToken = default)
+    {
+        using var client = new SmtpClient();
+        try
+        {
+            await client.ConnectAsync(_smtpSettings.Host, _smtpSettings.Port, SecureSocketOptions.StartTlsWhenAvailable, cancellationToken);
+            await client.AuthenticateAsync(_smtpSettings.User, _smtpSettings.Pass, cancellationToken);
+            await client.DisconnectAsync(true, cancellationToken);
+            return HealthCheckResult.Healthy("SMTP server is responding correctly.");
+        }
+        catch (Exception ex)
+        {
+            return HealthCheckResult.Unhealthy("Failed to connect or authenticate with SMTP server.", exception: ex);
+        }
+    }
+}
--- a/backend/JoaoLoureiro.Portfolio.Infrastructure/JoaoLoureiro.Portfolio.Infrastructure.csproj
+++ b/backend/JoaoLoureiro.Portfolio.Infrastructure/JoaoLoureiro.Portfolio.Infrastructure.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="AspNetCore.HealthChecks.System" Version="9.0.0" />
+    <PackageReference Include="MailKit" Version="4.13.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\JoaoLoureiro.Portfolio.Application\JoaoLoureiro.Portfolio.Core.csproj" />
+  </ItemGroup>
+
+</Project>
--- a/backend/JoaoLoureiro.Portfolio.Infrastructure/Services/SmtpEmailSender.cs
+++ b/backend/JoaoLoureiro.Portfolio.Infrastructure/Services/SmtpEmailSender.cs
@@ -0,0 +1,44 @@
+using JoaoLoureiro.Portfolio.Core.Interfaces;
+using JoaoLoureiro.Portfolio.Core.Models;
+using JoaoLoureiro.Portfolio.Infrastructure.Settings;
+using MailKit.Net.Smtp;
+using MailKit.Security;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using MimeKit;
+
+namespace JoaoLoureiro.Portfolio.Infrastructure.Services;
+
+public class SmtpEmailSender(IOptions<SmtpSettings> smtpSettings, ILogger<SmtpEmailSender> logger) : IEmailSender
+{
+    private readonly SmtpSettings _smtpSettings = smtpSettings.Value;
+    private readonly ILogger<SmtpEmailSender> _logger = logger;
+
+    public async Task SendEmailAsync(EmailToSend email, CancellationToken cancellationToken = default)
+    {
+        var mimeMessage = new MimeMessage();
+        var fromAddress = _smtpSettings.FromEmail ?? _smtpSettings.User;
+
+        mimeMessage.From.Add(new MailboxAddress(email.SenderName, fromAddress));
+        mimeMessage.To.Add(MailboxAddress.Parse(_smtpSettings.ReceivingEmail));
+        mimeMessage.ReplyTo.Add(MailboxAddress.Parse(email.ReplyToEmail));
+        mimeMessage.Subject = $"New Portfolio Contact: {email.SenderName}";
+
+        var builder = new BodyBuilder
+        {
+            TextBody = $"Name: {email.SenderName}\nEmail: {email.ReplyToEmail}\nMessage: {email.MessageBody}",
+            HtmlBody = $@"<p><strong>Name:</strong> {email.SenderName}</p>
+                        <p><strong>Email:</strong> <a href=""mailto:{email.ReplyToEmail}"">{email.ReplyToEmail}</a></p>
+                        <p><strong>Message:</strong></p>
+                        <p>{email.MessageBody.Replace("\n", "<br>")}</p>"
+        };
+        mimeMessage.Body = builder.ToMessageBody();
+
+        using var client = new SmtpClient();
+
+        await client.ConnectAsync(_smtpSettings.Host, _smtpSettings.Port, SecureSocketOptions.StartTlsWhenAvailable, cancellationToken);
+        await client.AuthenticateAsync(_smtpSettings.User, _smtpSettings.Pass, cancellationToken);
+        await client.SendAsync(mimeMessage, cancellationToken);
+        _logger.LogInformation("Email sent successfully to {Recipient}", _smtpSettings.ReceivingEmail);
+    }
+}
--- a/backend/JoaoLoureiro.Portfolio.Infrastructure/Settings/SmtpSettings.cs
+++ b/backend/JoaoLoureiro.Portfolio.Infrastructure/Settings/SmtpSettings.cs
@@ -0,0 +1,11 @@
+namespace JoaoLoureiro.Portfolio.Infrastructure.Settings;
+
+public class SmtpSettings
+{
+    public required string Host { get; set; }
+    public int Port { get; set; }
+    public required string User { get; set; }
+    public required string Pass { get; set; }
+    public string? FromEmail { get; set; }
+    public required string ReceivingEmail { get; set; }
+}
--- a/backend/JoaoLoureiro.Portfolio.slnx
+++ b/backend/JoaoLoureiro.Portfolio.slnx
@@ -0,0 +1,5 @@
+<Solution>
+  <Project Path="JoaoLoureiro.Portfolio.Api/JoaoLoureiro.Portfolio.Api.csproj" />
+  <Project Path="JoaoLoureiro.Portfolio.Application/JoaoLoureiro.Portfolio.Core.csproj" />
+  <Project Path="JoaoLoureiro.Portfolio.Infrastructure/JoaoLoureiro.Portfolio.Infrastructure.csproj" />
+</Solution>
--- a/backend/README.md
+++ b/backend/README.md
@@ -1,96 +1,74 @@
-# Portfolio API Backend
+# JoaoLoureiro.Portfolio Backend

-This is a simple and efficient backend server built with Node.js and Express. Its primary purpose is to handle the contact form submissions from the portfolio frontend, sending emails via SMTP using Nodemailer.
+This is the backend for my portfolio application. It is a simple .NET 8 API that handles sending contact messages from the frontend.

-## ✨ Features
+## Technologies

-* **Email Service**: Securely sends emails from the contact form.
-* **Input Validation**: Ensures required fields (`name`, `email`, `message`) are present and the email format is valid.
-* **CORS Enabled**: Configured with CORS to only accept requests from the frontend application.
-* **Specific Error Handling**: Returns structured error keys for different SMTP and server issues, allowing the frontend to display translated, user-friendly messages.
-* **Health Check**: Includes a `/api/health` endpoint to easily verify if the server is running.
+*   .NET 8
+*   ASP.NET Core
+*   Docker
+*   Serilog for logging
+*   FluentValidation for request validation
+*   AutoMapper for object mapping

-## 🛠️ Tech Stack
+## Project Structure

-* **Runtime**: [Node.js](https://nodejs.org/)
-* **Framework**: [Express.js](https://expressjs.com/)
-* **Email**: [Nodemailer](https://nodemailer.com/)
-* **Environment Variables**: [Dotenv](https://github.com/motdotla/dotenv)
-* **Cross-Origin Requests**: [CORS](https://github.com/expressjs/cors)
+The solution follows a clean architecture pattern:

-## 🚀 Getting Started
+*   `JoaoLoureiro.Portfolio.Api`: The main API project, containing the endpoint for sending emails.
+*   `JoaoLoureiro.Portfolio.Application`: Contains the core business logic and interfaces.
+*   `JoaoLoureiro.Portfolio.Domain`: Contains the domain entities.
+*   `JoaoLoureiro.Portfolio.Infrastructure`: Contains the implementation of services, such as the email sender.
+
+## Getting Started

 ### Prerequisites

-* Node.js (v18 or later)
-* npm
+*   .NET 8 SDK
+*   An SMTP server for sending emails.

-### Installation & Setup
+### Running the application
+
+1.  Clone the repository.
+2.  Navigate to the `backend` directory.
+3.  Configure the `SmtpSettings` in `JoaoLoureiro.Portfolio.Api/appsettings.json`.
+4.  Run the application using the following command:

-1.  **Navigate to the backend directory:**
    ```bash
-    cd backend
+    dotnet run --project JoaoLoureiro.Portfolio.Api
    ```

-2.  **Install dependencies:**
-    ```bash
-    npm install
-    ```
+## API Endpoints

-3.  **Create an environment file:**
-    Create a file named `.env` in the `backend` directory and populate it with your credentials. **Do not commit this file to version control.**
+### POST /api/email/send

-    **.env.example**
-    ```env
-    # The port for the backend server
-    BACKEND_PORT=3001
+This endpoint accepts a contact form submission and sends it as an email.

-    # Your frontend URL for CORS
-    FRONTEND_URL=http://localhost:3000
+**Request Body:**

-    # Nodemailer SMTP Configuration
-    SMTP_HOST=smtp.example.com
-    SMTP_PORT=587
-    SMTP_SECURE=false
-    SMTP_USER=your-email@example.com
-    SMTP_PASS=your-email-password
-    YOUR_RECEIVING_EMAIL=your-personal-email@example.com
-    ```
+```json
+{
+  "name": "John Doe",
+  "email": "john.doe@example.com",
+  "message": "Hello, I would like to get in touch with you."
+}
+```

-4.  **Run the server:**
-    ```bash
-    npm start
-    ```
-    The server will start on the port defined in your `.env` file (e.g., `3001`).
+**Responses:**

-## 📝 API Endpoints
+*   `200 OK`: If the message was sent successfully.
+*   `400 Bad Request`: If the request is invalid.
+*   `500 Internal Server Error`: If an unexpected error occurs.

-### Health Check
+### GET /health

-* **GET** `/api/health`
-    * **Description**: Checks the server status.
-    * **Success Response (200)**:
-        ```json
-        { "status": "UP", "message": "Backend is running" }
-        ```
+This endpoint returns the health of the application, including the status of the SMTP connection.

-### Send Email
+## Configuration

-* **POST** `/api/email/send`
-    * **Description**: Processes and sends a contact form submission.
-    * **Request Body**:
-        ```json
-        {
-          "name": "string",
-          "email": "string",
-          "message": "string"
-        }
-        ```
-    * **Success Response (200)**:
-        ```json
-        { "message": "Message sent successfully!" }
-        ```
-    * **Error Responses (4xx/5xx)**: Returns a JSON object with an `errorKey` for the frontend to translate.
-        ```json
-        { "errorKey": "smtp_auth_failed" }
-        ```
+The application is configured using the `appsettings.json` file in the `JoaoLoureiro.Portfolio.Api` project.
+
+*   `SmtpSettings`: Configuration for the SMTP server.
+*   `CorsOrigins`: A comma-separated list of allowed origins for CORS.
+*   `ProxyIP`: The IP address of a trusted proxy.
+*   `Serilog`: Configuration for logging.
--- a/backend/ecosystem.config.json
+++ b/backend/ecosystem.config.json
@@ -1,12 +1,13 @@
 {
  "apps": [{
    "name": "portfolio-backend",
-    "script": "server.js",
+    "script": "dotnet",
+    "args": "JoaoLoureiro.Portfolio.Api/bin/Release/net8.0/JoaoLoureiro.Portfolio.Api.dll",
    "instances": 1,
    "autorestart": true,
    "watch": false,
    "env": {
-      "NODE_ENV": "production"
+      "ASPNETCORE_ENVIRONMENT": "Production"
    }
  }]
 }
--- a/backend/global.json
+++ b/backend/global.json
@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "10.0.0",
+    "rollForward": "latestMajor",
+    "allowPrerelease": true
+  }
+}
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -1,871 +0,0 @@
-{
-  "name": "backend",
-  "version": "1.0.0",
-  "lockfileVersion": 3,
-  "requires": true,
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-      "version": "1.0.0",
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-        "express": "^5.1.0",
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-      }
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-      "license": "MIT",
-      "dependencies": {
-        "mime-types": "^3.0.0",
-        "negotiator": "^1.0.0"
-      },
-      "engines": {
-        "node": ">= 0.6"
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-    },
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-    "node_modules/unpipe": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
-      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==",
-      "license": "MIT",
-      "engines": {
-        "node": ">= 0.8"
-      }
-    },
-    "node_modules/vary": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
-      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
-      "license": "MIT",
-      "engines": {
-        "node": ">= 0.8"
-      }
-    },
-    "node_modules/wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "license": "ISC"
-    }
-  }
-}
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,20 +0,0 @@
-{
-  "name": "backend",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "start": "node server.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
-  "type": "commonjs",
-  "dependencies": {
-    "cors": "^2.8.5",
-    "dotenv": "^16.5.0",
-    "express": "^5.1.0",
-    "nodemailer": "^7.0.3"
-  }
-}
--- a/backend/routes/email.js
+++ b/backend/routes/email.js
@@ -1,58 +0,0 @@
-const express = require('express');
-const nodemailer = require('nodemailer');
-const router = express.Router();
-
-router.post('/send', async (req, res) => {
-  const { name, email, message } = req.body;
-
-  if (!name || !email || !message) {
-    return res.status(400).json({ errorKey: 'status_error_all_fields' });
-  }
-  if (!/\S+@\S+\.\S+/.test(email)) {
-    return res.status(400).json({ errorKey: 'status_error_invalid_email' });
-  }
-
-  const transporter = nodemailer.createTransport({
-    host: process.env.SMTP_HOST,
-    port: parseInt(process.env.SMTP_PORT || '587', 10),
-    secure: process.env.SMTP_SECURE === 'true',
-    auth: {
-      user: process.env.SMTP_USER,
-      pass: process.env.SMTP_PASS,
-    },
-  });
-
-  const mailOptions = {
-    from: `"${name}" <${process.env.SMTP_FROM_EMAIL || process.env.SMTP_USER}>`,
-    replyTo: email,
-    to: process.env.YOUR_RECEIVING_EMAIL,
-    subject: `New Portfolio Contact: ${name}`,
-    text: `Name: ${name}\nEmail: ${email}\nMessage: ${message}`,
-    html: `<p><strong>Name:</strong> ${name}</p>
-           <p><strong>Email:</strong> <a href="mailto:${email}">${email}</a></p>
-           <p><strong>Message:</strong></p>
-           <p>${message.replace(/\n/g, '<br>')}</p>`,
-  };
-
-  try {
-    await transporter.sendMail(mailOptions);
-    res.status(200).json({ message: 'Message sent successfully!' });
-  } catch (error) {
-    if (error.code) {
-      switch (error.code) {
-        case 'EAUTH':
-          return res.status(500).json({ errorKey: 'smtp_auth_failed' });
-        case 'ECONNECTION':
-          return res.status(500).json({ errorKey: 'smtp_connection_failed' });
-        case 'EENVELOPE':
-          return res.status(400).json({ errorKey: 'smtp_invalid_recipient' });
-        default:
-          return res.status(500).json({ errorKey: 'smtp_generic_error' });
-      }
-    }
-
-    res.status(500).json({ errorKey: 'server_unexpected_error' });
-  }
-});
-
-module.exports = router;
--- a/backend/server.js
+++ b/backend/server.js
@@ -1,26 +0,0 @@
-require('dotenv').config();
-const express = require('express');
-const cors = require('cors');
-const emailRoutes = require('./routes/email');
-
-const app = express();
-const PORT = process.env.BACKEND_PORT || 3001;
-
-// Middleware
-app.use(cors({
-  origin: process.env.FRONTEND_URL || 'http://localhost:3000', // Adjust for your frontend URL
-}));
-app.use(express.json());
-
-
-
-// Routes
-app.use('/api/email', emailRoutes); // All email routes will be prefixed with /api/email
-
-app.get('/api/health', (req, res) => { // Health check endpoint
-    res.status(200).json({ status: 'UP', message: 'Backend is running' });
-});
-
-app.listen(PORT, () => {
-  console.log(`Backend server running on port ${PORT}`);
-});