Is it just me or does that “comparison” make no sense for this thread. It’s mostly comparing vaultwarden to the cloud version of bitwarden, not the self hosted version. It only mentions the self hosted version in passing. It doesn’t do anything to help someone choose between vaultwarden and self hosted bitwarden
So a reverse proxy is sort of like a phonebook or directory, it routes outside requests to the appropriate place. So imagine your reverse proxy is a receptionist, someone comes in and says “hey I am looking for plex.mydomain.com” the receptionist would then use the phonebook and say “ok if you are looking for plex.mydomain.com, go to building 192.168.1.10 (the ip), room 9000 (the port)”
Since you are asking about dockerized services, the networking for those can be done in several different ways, but the one thing that really matters is that each service needs to have a unique combination of ip and port, because only 1 service can live at each address. With docker, you could set up multiple services that use the host server’s ip, in which case each container will need to be on different ports, or you could have it so each container has its own ip, in which case the port can be anything.
I’m fairly certain hardware based 2fa has been around since the early 90s maybe even earlier. It’s not the maturity that’s the issue, as I’m fairly certain its significantly older than application based, but that it’s extremely inconvenient for the user to have to buy a physical key and keep it safe
there’s an entire wikipedia article for this that makes it super easy https://en.wikipedia.org/wiki/Pirated_movie_release_types