Go live version

Hi everybody,
I really need help to publish my project live to Linodes
Docker : Nodes / Postgre
I spend hours trying to publish my project live to test it… Never be able to deploy it correctly and connect database.
I tryed the new ressource manager and never connected DB…
What is the best way to do? I 've read every topics here… Is there any clean process to follow anywhere? I’m confused with all solutions, tricks, …
Many thanks