Add Dockerfile

[smuth4]

Uses Debian in order to align build and run images on the same supported platform. Note that GLUSTER_VERSION must be set to a number rather than LATEST due to http://download.gluster.org/pub/gluster/glusterfs/LATEST/rsa.pub being a 404 as well as differences in directory structure.
I also noticed that despite 567cf6d removing gometalinter, the scripts/ directory was never touched, so it's still required to be installed for the make commands to work.

[aravindavk]

Thanks for pointing to gometalinter issue in scripts directory. I will send PR to address that issue.

[aravindavk]

Please move the Dockerfile to extras directory. May be with name debian.Dockerfile

[adampl]

Hi, how to run this container to make it work with a Gluster cluster?

I asked in #73 but now I see you created your own image, but the issue remains unresolved.

By the way, this Dockerfile doesn't build, I'm getting this:

E: Failed to fetch https://download.gluster.org/pub/gluster/glusterfs/6/LATEST/Debian/9/amd64/apt/pool/main/g/glusterfs/glusterfs-server_6.6-1_amd64.deb
GnuTLS recv error (-9): A TLS packet with unexpected length was received.

[smuth4]

I am unable to reproduce this on the latest code, and it's odd that it would allow adding/updating the repo but bail on the actual package repo. Is it consistent? If not, it might be related to https://bugs.launchpad.net/ubuntu/+source/gnutls26/+bug/1111882, if so, you may want to double check your network's setting,

Edit: also, you can ignore your cached images by adding the --no-cache --pull flags temporarily.

[adampl]

Maybe I was building the image in a wrong context. I will check it once it's merged. Thanks :)

[smuth4]

That PR only adds documentation, it doesn't change anything about the build itself.

[adampl]

Ah, sorry, you're right xD