Add docker setup

[JannikStreek]

Currently there is no docker setup. This is important to make it easier for new developers and deployments later.

Main points:

• [x] Docker setup
• [x] Docker compose setup
• [x] Database setup in compose setup: Postgres vs. mysql

[AugustinMauroy]

Also docker should have a mysql instance. Other point docker can be a dev env.

[AugustinMauroy]

@JannikStreek do you want to work on this issue ?

[JannikStreek]

@JannikStreek do you want to work on this issue ?

yes, already on it :) I would suggest Postgres though - or is there a specific reason why you want to use mysql?

[AugustinMauroy]

I would suggest Postgres though - or is there a specific reason why you want to use mysql?

We can still change. We use Prisma so it's not too complicated but what we're waiting for is to be able to have different providers on a single Prisma client to support different db.