dockerfiles/unmaintained/reverse/rootfs/nginx/path.d/template_auth

  location <frontend_path> {
    include /nginx/conf.d/proxy.conf;
    auth_basic "Who's this?";
    auth_basic_user_file "<auth_file>";
    client_max_body_size <frontend_domain_max_body_size>;
    proxy_pass http://<backend_addr>:<backend_port>;
  }