I want to deploy nodeBB on AWS ec2. is there a documentation for this?

Hi All
I am not getting how the Login form is rendering on the UI. I can see in the public folder that login.tpl is formed. But Not sure where these htmls are defined.
I am changing in the login.tpl and restarting but it is not picking up the changes on UI.
Actually I want to integrate my own sso to the Login button, but not able to proceed.

Can someone please help?