Add the images being pushed

[timfallmk]

Just a quick change to include the image tag being built. If a repository has multiple tags in an automated build, they'll all show up as the same notification.

[andykent]

Hmm, I get the issue but I do think the formatting could be a bit nicer, maybe we should truncate the SHAs to 6 chars, git style? What do you think?

[timfallmk]

Yeah, I was hoping they would expose the tags the images had instead of the hashes. Truncated seems like it would work.

[timfallmk]

@andykent Have any magic up your sleeve for doing the truncation on the same line? ;)

[n0mer]

@timfallmk , is it possible to include label ("tag") of pushed image?
And, https://docs.docker.com/docker-hub/builds/#webhooks page says that it is also possible to include "builder" (author) information.

[timfallmk]

Just a ping on this. Should be possible to add any of those fields linked to above.