I don’t know if you already used Docker before, but when I learned Phoenix and struggled with the Database and environment changes (from dev to prod specifically), learning Docker is what solved my problems.
If you want, I wrote a guide a few weeks ago to have a compose stack running smoothly in production.
Link : Proposition for an official Docker Compose Guide
It is down to the fundamentals which make it imperfect (cf comments), but it works, and may be helpful to you, who should be taking it slowly.
