Version control tools for taskcluster images
npm install taskcluster-vcs

``DockerfileEdit
and src/cli/moz-cache.js to update the version number.
docker build -t taskcluster/taskcluster-vcs:$VERSION .
docker login
docker push taskcluster/taskcluster-vcs:$VERSION
`
Consider running npm update first and testing the result.
```Edit package.json to update the revision
npm shrinkwrap
npm login
npm publish
Don't forget to commit and push the changes.
After publishing a new version to npm and deploying a new docker image with that version, the image and version can be tested by duplicating the tc-vcs TaskCluster hook and replacing the image version number with the newly created version. Run the task and ensure the tasks that it schedules complete successfully. At a minimum tasks for hg, git, and android repo clones should be tested.