added entrypoint for docker

docker-compose.yml

@@ -4,11 +4,19 @@ services:
   schichtplaner:
     container_name: schichtplaner
     image: ghcr.io/donpat1to/schichtenplaner:v1.0.0
+    environment:
+      - NODE_ENV=production
+      - JWT_SECRET=${JWT_SECRET:-your-secret-key-please-change}
     ports:
       - "3002:3002"
     volumes:
       - app_data:/app/data
     restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3002/api/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
 
 volumes:
   app_data: