Reload app settings on .env file change for local deployment

[rragundez]

IMPORTANT: PR #222 has to be merged first.

At the moment there is a mixture of getting settings from environment variables and from an .env file. This is confusing and can lead to cumbersome bugs. This PR addresses the problem only for the local deployment (prod and staging will come later) where it makes it clear that settings will only be taken from the .env file (via environment variables) and removes the setting of environment variables to the runtime via the docker compose definition.
While doing that then it is also possible to enable reloading of the application based on changes to the .env file, which is quite useful for development. At the moment the app only reload when py files change.
It also removed the command in the docker compose definition and simplifies the responsibility of running the command by giving it solely to the Dockerfile (at the moment it seems to be and be promoted via the comments to change the command in either dockerfile or docker compose which is confusing for a user).

[igorbenav]

@LucasQR

[LucasQR]

I'm testing this pr, and you said "While doing that then it is also possible to enable reloading of the application based on changes to the .env file, which is quite useful for development" but it doesn't seem to happen. I tried changing the ADMIN_PASSWORD on .env with the app running and then login as the admin with the new password.
It says the new admin tables are being created, says the app reloaded but the password doesn't actually change

[rragundez]

@LucasQR thanks so much for checking, perhaps you forgot to add --build to the docker compose command? there is a change in the Dockerfile to watch the .env file so it needs to be rebuilt.

BTW because the commits were squashed from the other PR I had to force pushed, apologies but you will need to force pull. Hope not too much trouble.

let me know if you still see it not reloading on .env changes. Thanks again.

[rragundez]

Hi @LucasQR can you have another look? Check my comment above, maybe that was the issue