Running 2 RC App on same server

I need to test 2 RC Apps on same server, lets call them: /opt/RC01 & /opt/RC02

How do I stop RC01 without affecting RC02 and vise-versa ?

Also I noticed I have to enable Mongo and Rocketchat during RC installation like so:
systemctl enable mongod
systemctl enable rocketchat

Do I need to run “enable” only once during installation or anytime I stop/start Rocketchat server ?

Thank you !