Nginx代理前端和后端服务器

Question

致力于使用nginx负载平衡器托管前端和后端服务器。我正在使用docker compose从Amazon ECR中拉出，然后运行容器。泊坞窗容器可以单独工作，但是我正在努力将它们之间链接起来，然后使用nginx路由到不同的服务器。

这是docker compose文件

version: '3'
services:
  backend:
    image: ecr-backend
    ports:
    - "1235:1235"
    networks: 
    - gg-internal

  frontend:
    image: ecr-frontend
    ports:
    - "8081:80"
    networks: 
    - gg-internal

  loadbalancer:
    image: ecr-loadbalancer
    ports: 
    - "80:80"
    - "8080:8080"
    networks: 
    - gg-internal

networks:
  gg-internal:

还有nginx配置

worker_processes 1;

events { worker_connections 1024; }

http {

    upstream front {
        server frontend;
    }

    upstream backserver {
        server backend;
    }

    sendfile on;

    server {
        listen 80;


        location /socket.io {
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            proxy_pass         http://backserver/socket.io/;
            proxy_redirect     off;
            proxy_set_header   Host $host;
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header   X-Forwarded-Host $server_name;
        }

        location / {
            proxy_pass         http://front;
            proxy_redirect     off;
            proxy_set_header   Host $host;
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header   X-Forwarded-Host $server_name;
        }

        location /api {
            proxy_pass         http://backserver:1235/api/;

            proxy_redirect     off;
            proxy_set_header   Host $host;
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header   X-Forwarded-Host $server_name;
        }

    }
}

它从前端服务器接收前端页面，但不会将/ api重新路由到后端。

任何帮助将不胜感激：）