Switch to official coturn image

[thedanbob]

Coturn got an official image recently (coturn/coturn#746) from the maintainer of instrumentisto/coturn. As far as I can tell the original image isn't deprecated yet but probably will be soon, e.g. instrumentisto/coturn-docker-image#37 (comment).

[spantaleev]

Thanks! 👍

I wonder if we need NET_BIND_SERVICE if we're not asking it to bind to privileged ports (<=1023). Have you tested if it works without this?

[thedanbob]

I did, unfortunately it doesn't start due to this line in the Dockerfile: https://github.com/coturn/coturn/blob/b31b0049220ef26e87d784f65e3db286cbdc50a2/docker/coturn/alpine/Dockerfile#L120

[spantaleev]

That's somewhat unfortunate, but it's no big deal.

Thanks for switching us to the official image! 👍