Add Docker support and containerization

- Add Dockerfile for Next.js application
- Configure standalone output for Docker
- Add .dockerignore file
- Add docker-compose.yml for easy deployment
- Update next.config.ts for Docker compatibility

docker-compose.yml

@@ -0,0 +1,18 @@
+version: '3.8'
+
+services:
+  prayer-app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    ports:
+      - "3000:3000"
+    environment:
+      - NODE_ENV=production
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000/api/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s