为什么代理到 PHP 时会出现 Coolify Docker 网关超时？

我有一个 Coolify 环境，其中包含一个由 PHP Web 服务器和 nginx 代理组成的 docker compose。nginx 代理提供静态文件并充当 PHP 服务器的代理。

我在 Coolify 中设置了两个域，如下所示 https://app.example.org:80，https://static.example.org:80 这是我的 Docker 撰写文件：

version: '3.8'

services:
  app:
    image: php:8.3-fpm-alpine
    container_name: php-app
    working_dir: /var/www/html
    volumes:
#      - ./:/var/www/html
      - ./config:/var/www/html/config
      - ./backup:/var/www/html/backup
      - ./userdata:/var/www/html/userdata
      - ./.logs:/var/www/html/.logs
    ports:
      - "9000:9000"
    environment:
      PHP_OPCACHE_ENABLE: "1"
      PHP_OPCACHE_MEMORY_CONSUMPTION: "128"
    build:
      context: .
      dockerfile: Dockerfile
    networks:
      - app-network

  webserver:
    image: nginx:alpine
    container_name: nginx-web
    volumes:
      - ./nginx/sites:/etc/nginx/sites
      - ./nginx/nginx.conf:/etc/nginx/nginx.conf
      - ./shared_assets:/var/www/html/shared_assets
      - ./instances:/var/www/html/instances
    environment:
      - ENVIRONMENT=production
    ports:
      - "89:80"
    depends_on:
      - app
    networks:
      - app-network

networks:
  app-network:

对于 Nginx，我配置了两个站点

server {
    listen 80;
    server_name static.example.org;

    root /var/www/html/shared_assets;
    index index.html index.htm;

    # Serve static files from the shared_assets folder
     location /assets/ {
            alias /var/www/html/shared_assets/assets/;  # Fix the alias path to match the actual filesystem location
            try_files $uri $uri/ =404;
        }
}

server {
    listen 80;
    server_name app.example.org;

    root /var/www/html/instances/app/public;
    index index.php;
    add_header Access-Control-Allow-Origin "*";

    location / {
        try_files $uri /index.php$is_args$args;
    }

    location ~ \.php$ {
        include fastcgi_params;
        fastcgi_pass app:9000;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    }

    location ~ /\.ht {
        deny all;
    }
}

静态文件服务正常，但应用程序提示网关超时。此设置在我本地机器上运行良好。

知道可能是什么问题吗？