Drone nginx settings.

drone_nginx.conf

map $http_upgrade $connection_upgrade {
  default upgrade;
  ''      close;
}

server {

  listen 80;
  server_name example.com;

  location / {
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header Host $http_host;
    proxy_set_header Origin "";
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    proxy_pass http://127.0.0.1:8089;
    proxy_http_version 1.1;
    proxy_redirect off;
    proxy_buffering off;

    chunked_transfer_encoding off;
  }

}