Jenkins configuration for Nginx reverse proxy

nginx.conf

http {
  # SSL Settings
  ssl_session_cache shared:SSL:20m;
  ssl_session_timeout 180m;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_session_tickets off;
  ssl_certificate         /certs/cert.crt;
  ssl_certificate_key     /certs/cert.key;
  ssl_prefer_server_ciphers on;
  ssl_ciphers ECDH+AESGCM:ECDH+AES256:ECDH+AES128:DHE+AES128:!ADH:!AECDH:!MD5;

  # Proxy settings
  proxy_set_header X-Real-IP $remote_addr;
  proxy_ssl_session_reuse on;

  server {
    server_name external.address.tld;
    listen 443 ssl;

    ignore_invalid_headers off;

    location / {
      proxy_set_header Host $host:$server_port;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_http_version 1.1;
      proxy_pass http://jenkins.internal.address:8080;
      # The following address CANNOT HAVE SLASH AT THE END! 
      # If it has the slash you will see the error 
      # "It appears that your reverse proxy set up is broken"
      proxy_redirect http://jenkins.internal.address:8080 https://external.address.tld;
    }
  }
}