Add Docker configuration for port 3500

- Add Dockerfile with multi-stage build for production
- Add docker-compose.yml for easy deployment
- Add .dockerignore to exclude unnecessary files
- Add DOCKER_SETUP.md with comprehensive setup guide
- Update next.config.js to enable standalone output mode
- Configure app to run on port 3500
- Keep MySQL server external to Docker

docker-compose.yml

@@ -0,0 +1,43 @@
+version: '3.8'
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    ports:
+      - "3500:3500"
+    environment:
+      - NODE_ENV=production
+      - DATABASE_URL=${DATABASE_URL}
+      - NEXTAUTH_URL=${NEXTAUTH_URL:-http://localhost:3500}
+      - NEXTAUTH_SECRET=${NEXTAUTH_SECRET}
+      - AUTH_SECRET=${AUTH_SECRET}
+    restart: unless-stopped
+    depends_on:
+      - db-check
+    networks:
+      - app-network
+
+  # Health check service to ensure MySQL is accessible
+  db-check:
+    image: mysql:8.0
+    command: >
+      sh -c "
+        until mysqladmin ping -h$${DB_HOST} -P$${DB_PORT} -u$${DB_USER} -p$${DB_PASSWORD} --silent; do
+          echo 'Waiting for MySQL...';
+          sleep 2;
+        done;
+        echo 'MySQL is ready!';
+      "
+    environment:
+      - DB_HOST=${DB_HOST:-localhost}
+      - DB_PORT=${DB_PORT:-3306}
+      - DB_USER=${DB_USER:-root}
+      - DB_PASSWORD=${DB_PASSWORD}
+    networks:
+      - app-network
+
+networks:
+  app-network:
+    driver: bridge