fix: add Dockerfile and docker-compose configuration for backend and frontend services

backend/Dockerfile

@@ -0,0 +1,47 @@
+# Build stage - using .NET SDK
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
+WORKDIR /src
+
+# Copy project files first for better layer caching
+COPY ["*.sln", "./"]
+COPY ["JoaoLoureiro.Portfolio.Api/*.csproj", "JoaoLoureiro.Portfolio.Api/"]
+COPY ["JoaoLoureiro.Portfolio.Application/*.csproj", "JoaoLoureiro.Portfolio.Application/"]
+COPY ["JoaoLoureiro.Portfolio.Domain/*.csproj", "JoaoLoureiro.Portfolio.Domain/"]
+COPY ["JoaoLoureiro.Portfolio.Infrastructure/*.csproj", "JoaoLoureiro.Portfolio.Infrastructure/"]
+
+# Restore dependencies
+WORKDIR "/src/JoaoLoureiro.Portfolio.Api"
+RUN dotnet restore
+
+# Copy remaining source code
+WORKDIR "/src"
+COPY . .
+
+# Build and publish
+WORKDIR "/src/JoaoLoureiro.Portfolio.Api"
+RUN dotnet publish -c Release -o /app/publish
+
+# Runtime stage
+FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
+WORKDIR /app
+
+# curl used by docker-compose healthcheck
+RUN apt-get update \
+    && apt-get install -y curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Configure logging to show in container logs
+ENV ASPNETCORE_ENVIRONMENT=Development
+ENV DOTNET_CLI_TELEMETRY_OPTOUT=1
+ENV ASPNETCORE_URLS=http://+:3001
+ENV ASPNETCORE_HTTP_PORT=3001
+ENV ASPNETCORE_LOGGING__CONSOLE__DISABLECOLORS=true
+
+# Expose the port
+EXPOSE 3001
+
+# Copy published app
+COPY --from=build /app/publish .
+
+# Entry point with enhanced logging
+ENTRYPOINT ["dotnet", "JoaoLoureiro.Portfolio.Api.dll"]