new puma user log

[seuros]

@mcb
i refactored the code so we can use the server proprieties instead .
this way we can have different user for each server.

server 'server1', user: 'superuser', roles: %w(web app db), run_as: 'simple_user'
server 'server2', user: 'superuser2', roles: %w(web app), puma_user: 'puma_user'

[mcb]

@seuros Looks good to me 👍

[seuros]

@mcb released. Thank you for your work,

[mcb]

@seuros Thanks for merging. This helps quite a lot.