Docker installation still uses sqlite

[vlejd]

When following instructions setup with docker, it correctly creates postgres containers, but django still uses sqlite.
Can we a) add note that you need to do it manually b) remove postgres from docker compose c) add instructions on how to add it ?
I am happy to make a PR.

[wsvincent]

Yes you're right. I'm going to update that tomorrow. I agree can/should have PostgreSQL for Docker.

[wsvincent]

Ok, updated. I went for as simple an implementation as I could. Adding pyscopg2-binary, updating docker-compose.yml, and a note on updating the DATABASES section. Let me know what you think!