It isn't a question.
I already asked for this and nobody answered, so I figured it out by myself. I wish to leave my steps here in case somebody else might find it useful.
I used a droplet with CentOS 7 and TomCat 8...
I'm very new to server management, so sorry for maybe a stupid question.
My droplet runs on CentOS 7. I'm using TomCat since my webapp is Java based.
For now it is deployed and working under the standard U...