This is going to be the v4.
Expected improvements:
- More reliable due to static typing.
- Bump of performance.
- Improvement of logging.
- Authelia can be shipped as a single binary.
- Will likely work on ARM architecture.
Displaying only one option at 2FA stage will allow to add more options
like DUO push or OAuth.
The user can switch to other option and in this case the option is
remembered so that next time, the user will see the same option. The
latest option is considered as the prefered option by Authelia.
