Update website

The website seemed to be untouched for a little while. I needed to change quite a bit to make it work locally.

If thats too big to review, I can file smaller MRs, but I think all changes are needed.

• updates the dependencies to get rid of python2
• Deletes the Reddit channel from the website since I am not aware of anyone managing it
• Removes the outdated info about the sync meeting
• Add the maintainers email to contact page