Adding Docker

[zaratan]

Why ?

Sometimes we change our computer, sometime we want to do something only once that will work on our machine and production.

Must have

• A Dockerfile for the app that can work alone with docker run
• A docker-compose.yml with the app and the db configured
• The app must run migration and db creation automatically upon start.

Correction in video format

• Corrigé vidéo (Could have been better if we waited for the DB to be ready before running rails db:create)

Reading list

• https://docs.docker.com/engine/reference/builder/
• https://docs.docker.com/develop/develop-images/dockerfile_best-practices/