TOTP via PyOTP

[stefango79]

Hi,

I did some changes for 2FA. Now it's using PyOTP to generate the access token. I tested it with my Schlundtech account via the Docker version. I also edited the setup.py install_requiremnts, but I didn't test it his way. Is there a better way for Docker than RUN pip install for PyOTP?
This is my first (and probably last) Python program, so I didn't change the parameter name for TOKEN, as I didn't wont to break anything. Maybe the name is not the best anymore.

I tested it a few times with my account and also with more than one domain via the -d option. (domain1.com, *.domain1.com, domain2.com, *.domain2.com).

Let me know, if you need some further testing or some changes.

Best regards from Ruhrpott
Stefan

[stefango79]

I cleaned up the Dockerfile. PIP install was obsolete. Pretty sure it works as expected now.

[dwt]

@couchtyp this looks much more in line with what I would expect from 2fa support. Without something like this, I need to always have an external mechanism that updates the configuration file all the time before invoking certbot, which is quite annoying.

Any reason you don't want to merge this?