docker-compose-collection/nginx_reverse+code-server/nginx/conf.d/proxy_code_server.conf

proxy_set_header       Host         $host;
proxy_set_header       Upgrade      $http_upgrade;
proxy_set_header       Connection   upgrade;
proxy_set_header       Accept-Encoding  gzip;
proxy_set_header       X-Real-IP    $remote_addr;
proxy_set_header       X-Forwarded-For  $proxy_add_x_forwarded_for;