I got it like just adding this config to the vhost.conf my subdomain(i.e jenkins) or into web server settings in Plesk.
ProxyPass / http://localhost:1122/
ProxyPassReverse / http://localhost:1122/
ProxyRequests Off
ProxyPreserveHost On
<Proxy http://localhost:1122/*>
Order deny,allow
Allow from all
</Proxy>