Add Docker development environment with hot reloading

backend/Dockerfile.dev

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+FROM node:22-alpine
+
+# Install ffmpeg for video processing
+RUN apk add --no-cache ffmpeg
+
+# Set working directory
+WORKDIR /app
+
+# Install dependencies
+COPY package*.json ./
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Create uploads directory
+RUN mkdir -p uploads/videos uploads/thumbnails uploads/subtitles uploads/transcripts uploads/documents uploads/textversions
+
+# Create a non-root user
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+RUN chown -R appuser:appgroup /app
+
+# Switch to non-root user
+USER appuser
+
+# Expose port
+EXPOSE 4000
+
+# Start development server with hot reloading
+CMD ["npm", "run", "dev"]

backend/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "commonjs",
+    "lib": ["ES2022"],
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": false,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "declaration": false,
+    "declarationMap": false,
+    "sourceMap": true,
+    "removeComments": true,
+    "noImplicitReturns": false,
+    "noFallthroughCasesInSwitch": false,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "exactOptionalPropertyTypes": false,
+    "noImplicitOverride": false,
+    "noPropertyAccessFromIndexSignature": false,
+    "noUncheckedIndexedAccess": false,
+    "allowUnusedLabels": true,
+    "allowUnreachableCode": true
+  },
+  "include": [
+    "src/**/*"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist",
+    "**/*.test.ts",
+    "**/*.spec.ts"
+  ]
+}

docker-compose.dev.yml

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+services:
+  # Frontend development service with hot reloading
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile.dev
+    restart: unless-stopped
+    ports:
+      - "3000:3000"
+    depends_on:
+      - mongodb
+    environment:
+      - NODE_ENV=development
+      - NEXT_PUBLIC_API_URL=http://localhost:4000
+    volumes:
+      - ./frontend/src:/app/src:rw
+      - ./frontend/public:/app/public:rw
+      - ./frontend/package.json:/app/package.json:rw
+      - ./frontend/package-lock.json:/app/package-lock.json:rw
+      - ./frontend/next.config.js:/app/next.config.js:rw
+      - ./frontend/tailwind.config.js:/app/tailwind.config.js:rw
+      - ./frontend/postcss.config.js:/app/postcss.config.js:rw
+      - ./frontend/tsconfig.json:/app/tsconfig.json:rw
+      - /app/node_modules
+      - /app/.next
+    networks:
+      - app-network
+    command: npm run dev
+
+  # Backend development service with hot reloading
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile.dev
+    restart: unless-stopped
+    ports:
+      - "4000:4000"
+    depends_on:
+      - mongodb
+    environment:
+      - NODE_ENV=development
+      - MONGODB_URI=mongodb://mongodb:27017/ocd-website
+      - PORT=4000
+    volumes:
+      - ./backend/src:/app/src:rw
+      - ./backend/package.json:/app/package.json:rw
+      - ./backend/package-lock.json:/app/package-lock.json:rw
+      - ./backend/tsconfig.json:/app/tsconfig.json:rw
+      - ./backend/uploads:/app/uploads:rw
+      - /app/node_modules
+      - /app/dist
+    networks:
+      - app-network
+    command: npm run dev
+
+  # MongoDB service for development
+  mongodb:
+    image: mongo:7.0
+    restart: unless-stopped
+    ports:
+      - "27017:27017"
+    volumes:
+      - mongo-dev-data:/data/db:rw
+      - ./mongo-init:/docker-entrypoint-initdb.d:ro
+    networks:
+      - app-network
+    environment:
+      - MONGO_INITDB_DATABASE=ocd-website
+    healthcheck:
+      test: echo 'db.runCommand("ping").ok' | mongosh localhost:27017 --quiet
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+# Networks
+networks:
+  app-network:
+    driver: bridge
+
+# Volumes
+volumes:
+  mongo-dev-data:
+    name: ocd-mongo-dev-data

frontend/Dockerfile.dev

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+FROM node:22-alpine
+
+# Set working directory
+WORKDIR /app
+
+# Install dependencies
+COPY package*.json ./
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Create a non-root user
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+RUN chown -R appuser:appgroup /app
+
+# Switch to non-root user
+USER appuser
+
+# Expose port
+EXPOSE 3000
+
+# Start development server with hot reloading
+CMD ["npm", "run", "dev"]