Tutorial/Instructions for Docker or MatterMost or Kanboard?

I’m looking at installing (or trying to) Mattermost or Kanboard in a subdomain in a domains account. Both have docker images, but I’ve never used Docker either.

Any experience by anyone? Any suggestions?

For Docker you’ll have to run it on a separate server and point the IP of the subdomain to that server (Docker is a virtualization technology and is incompatible with shared hosting). I recommend Digital Ocean because they have a Docker image you can fire up and it at least takes care of that part. Unfortunately I haven’t tried running either of those pieces of software so I’m not sure beyond that what would be involved.