Set up backend API server with Express and Prisma

- Initialize Node.js/Express backend project structure
- Configure TypeScript for backend development
- Set up Prisma ORM with MySQL database schema
- Implement authentication middleware with Clerk
- Create photo upload endpoint with EXIF extraction
- Build report CRUD endpoints (create, read, delete)
- Add file upload handling with Multer
- Configure CORS and security middleware (helmet)
- Set up error handling and validation
- Create development environment configuration

Task 21 complete: Backend foundation ready for report submissions

server/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "beach-litter-api",
+  "version": "1.0.0",
+  "description": "Backend API for Beach Litter Mapping Platform",
+  "main": "dist/index.js",
+  "scripts": {
+    "dev": "tsx watch src/index.ts",
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "prisma:generate": "prisma generate",
+    "prisma:migrate": "prisma migrate dev",
+    "prisma:studio": "prisma studio"
+  },
+  "keywords": ["beach", "litter", "environment", "api"],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "@clerk/clerk-sdk-node": "^5.0.0",
+    "@prisma/client": "^5.22.0",
+    "cors": "^2.8.5",
+    "dotenv": "^16.4.5",
+    "express": "^4.21.1",
+    "express-validator": "^7.2.0",
+    "exifr": "^7.1.3",
+    "helmet": "^8.0.0",
+    "multer": "^1.4.5-lts.1",
+    "zod": "^3.23.8"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.17",
+    "@types/express": "^5.0.0",
+    "@types/multer": "^1.4.12",
+    "@types/node": "^22.9.0",
+    "prisma": "^5.22.0",
+    "tsx": "^4.19.2",
+    "typescript": "^5.6.3"
+  }
+}