Update Dockerfile

[pomazanbohdan]

error import key for postgres

[llacroix]

Files in nightly etc are automatically generated with the build.py script based on the versions.toml file.

The right place to make the changes are in the template subfolder which list 3 templates.

Python2
General
Odoo without addons and loaded in its own volume to be able to self update (not really recommended but can be nice for dev)

What's the error with the current key? I don't see any built image failing due to that.