The official docker image is still at v0.11 and was last updated in 2016. It looks like maybe trunk is at 0.12, but, as far as I can tell, that a rolling release. My prosody install is too important to go with a rolling release.

Both the alternatives that they point to are similarly old;

• v0.11.13 --- https://github.com/OpusVL/prosody-docker/
• v0.11.x (?) --- https://github.com/unclev/prosody-docker-extended

My server is langishing on the unclev image. I'd like to migrate to something with 0.12 and have a bit more confidence in its resiliance.