[h1d]

For reference, the official implementation uses MSSQL, and it's asking for 2GB memory instances, so I can see people liking alternatives.

https://help.bitwarden.com/article/install-on-premise/

And there are also other third party implementations too,

Go : https://github.com/VictorNine/bitwarden-go

Ruby : https://github.com/jcs/rubywarden