config

##nginx.conf

worker_processes 1;

events { worker_connections 1024; }

http {
    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;

    upstream api {
        server api:8085;
    }

    upstream site {
        server site_client:3000;
    }

    upstream server {
        server server:8080;
    }

    server {
        listen 80;
        server_name api.site.com;

        location / {
            proxy_pass         http://api;
            proxy_redirect     off;
        }
    }

    server {
        listen 80;
        server_name api2.site.com;

        location / {
            proxy_pass         http://server;
            proxy_redirect     off;
        }
    }

    server {
        listen 80;
        server_name site.com;

        location / {
            proxy_pass         http://site;
            proxy_redirect     off;
        }
    }
}