Set some services as configurable

### Summary

Set some services (for example, nginx, postgres) as configurable (for not deploying it)

### Motivation

I use my own postgresql installation for Sentry (and another docker containers) instead of having one postgresql-dockerized instance for each app. But sentry installs and get up of another server even when I doesn't require it.

I'll be great if some services non-essentials for the app (or susceptible of be outside too) can be configured for not deployment, for example, via some parameters on .env

### Additional Context