I would like to give my website an onion address and make it Tor accessible, while using TailsOS. Its currently on clearnet. How would I go about doing that?
Make sure your web server is listening on localhost port 80.
Add lines like this to your torrc, replacing hidden_service_name by a name of your choice:
HiddenServiceDir /Library/Tor/var/lib/tor/hidden_service_name HiddenServicePort 80 127.0.0.1:80