Update API base URL to use REACT_APP_BACKEND_URL and include '/api' path

backend/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "backend",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "scripts": {
+    "dev": "ts-node-dev --transpile-only --ignore-watch node_modules src/server.ts",
+    "typeorm": "ts-node-dev ./node_modules/typeorm/cli.js",
+    "build": "tsc"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.5.0",
+    "express": "^4.17.1",
+    "express-async-errors": "^3.1.1",
+    "multer": "^1.4.2",
+    "sqlite3": "^5.1.7",
+    "typeorm": "^0.2.29",
+    "yup": "^0.32.9"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.10",
+    "@types/express": "^4.17.8",
+    "@types/multer": "^1.4.5",
+    "ts-node": "^10.9.2",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^5.8.3"
+  }
+}