Use ubuntu as base image

[aschmois]

Story details: https://app.clubhouse.io/itprotv/story/69522

Changes:

• No longer creating haskell user at this level since we only need non-root complexity for developing purposes (tmp-postgres)
• Use ubuntu base image
  • This is a change we wanted to do
  • We decided on doing it now because amazon's base completely lost postgresql in the current repo and trying to solve that puzzle was not worth the time

[aschmois]

It's possible we can tighten this dependency down to just whatever tmp-postgres requires, but it's very difficult to figure out the exact package and we've sunk too much time to make it worth it. The only issue installing all of psql is that we'll have a server running for no reason in the dev toolbox. (and a bigger file size)

[aschmois]

Because we're installing postgresql we need to tell it that we don't care what the setup values are. We can remove this when we no longer install all of postgres.