Broken Permissions in chown command for rocketchat

[Borillion]

Line number 28 in the Docker file has a mistake. Note the (.) dot between rocketchat,
needs to have a (:) colon.

&& chown rocketchat.rocketchat /app/uploads

Docker.Official.Image/Dockerfile

Line 28 in fe70558

&& chown rocketchat.rocketchat /app/uploads

[snoopotic]

Well, a backwards-compatibility allows using a dot as delimiter for ‚chown‘. Sadly, usernames with a dot will have problems. But „rocketchat“ hasn‘t. So it‘s just a more or less cosmetic request.