dlinux-dashboard/proxy/proxy.conf

server {
      listen 80;
      listen [::]:80;

      server_name {PROXY_DOMAIN};

      location / {
            proxy_pass http://127.0.0.1:3000;
      }
}

server {
      listen 80;
      listen [::]:80;

      server_name "~^(port-(?<port>.*)\.)?(?<container>.*)\.{PROXY_DOMAIN}";

      location / {
            if ($port = "") {
                  set $port "80";
            }

            set $ip '';
            rewrite_by_lua_block {
                  local http = require("resty.http").new()

                  local res = http:request_uri("http://127.0.0.1:3000/containers/" .. ngx.var.container .. "/ip")
                  ngx.var.ip = res.body
            }

            proxy_pass http://$ip:$port;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
      }
}