With Node 16 and Debian Bullseye being out now, this updates the BlueWallet docker containers to these versions. On Citadel, this will allow faster downloads of the app because it always uses the up-to-date containers, and when (if) Umbrel migrates to Node 16, it'll also allow faster downloads there.
* Don't require BTC core connection
* Docker: Don't clone, but use local repo
* Add GitHub workflows
* Allow to overwrite hostname
* chore: update dependencies
* Get tor URL from env
