This commit aims at improving the user experience:
- Use a dedicated `Dockerfile` for the frontend
- Run the backend and frontend in "watch"/dev mode in Docker
- Do not start all Docker instances for small tasks
When we run e2e tests with the CI, we are doing lot of
calls to the backend in a short amount of time. This can
lead to a rate limit particulary on the "user/me" endpoint.
To avoid this, we will use different backend settings
for the e2e tests.
