added restart policy

docker-compose.yml

@@ -1,18 +1,24 @@
 services:
-    app:
-        build: .
-        ports:
-            - "5121:5121"
-        networks:
-            - static
-        volumes:
-            - instance:/app/instance
-            - sites:/app/sites
-        env_file: .env
+  app:
+    build: .
+    deploy:
+      restart_policy:
+        condition: on-failure
+        delay: 5s
+        max_attempts: 10
+        window: 120s
+    ports:
+      - "5121:5121"
+    networks:
+      - static
+    volumes:
+      - instance:/app/instance
+      - sites:/app/sites
+    env_file: .env
 
 networks:
-    static:
+  static:
 
 volumes:
-    instance:
-    sites:
+  instance:
+  sites:

run.py

@@ -6,6 +6,8 @@ app = create_app()
 
 if __name__ == "__main__":
     os.makedirs(app.config["UPLOAD_FOLDER"], exist_ok=True)
+    print(f"listening on port {config.Config.PORT}")
+
     with app.app_context():
         db.create_all()
         serve(app, host="0.0.0.0", port=config.Config.PORT)