Geyser is actually cross platform, not just bedrock.
Also, dragonproxy is entirely abandoned in favour of geyser so removed all instances of dragonproxy and just left a msg saying use geyser in the top level readme.
Enabled TCP fast open as the container runs on debian.
Cleared the forwarding secret, security measure.
Renamed forwarding mode to LEGACY so users don't get the initial startup error, and would work out of the box.