default.conf

server {
    listen                     45678;

    location / {
      proxy_pass http://ykService:3000; # Replace looker.domain.com with the name
                                                 # that clients will use to access Looker

      ### Force timeouts if one of backend hosts is dead ###
      proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;

      ### Set headers ###
      proxy_set_header          X-Real-IP $remote_addr;
      proxy_set_header          Accept-Encoding "";
      proxy_set_header          Host $http_host;
      proxy_set_header          X-Forwarded-For $proxy_add_x_forwarded_for;

      ### Don't timeout waiting for long queries - timeout is 1 hr ###
      proxy_read_timeout        3600;
      proxy_set_header          X-Forwarded-Proto $scheme;

      ### By default we don't want to redirect ###
      proxy_redirect            off;

      proxy_buffer_size         128k;
      proxy_buffers             4 256k;
      proxy_busy_buffers_size   256k;
    }
  }