Include it in your hubot's package.json as a dependency, and it's external-scripts.json file.
This section provides an example walkthrough of registering an application, adding environments for that application, and releasing a version of the application.
# Add an application
hubot application add foobar
#=> application foobar was added
# Add some environments to that application
hubot environment add staging to foobar
#=> environment staging added to foobar
hubot environment add production to foobar
#=> environment production added to foobar
# Ask if you can release that application to that environment
hubot can I release foobar to staging?
#=> yes, foobar is releasable to staging
# Release foobar/master to staging
hubot release foobar/master to staging
#=> user is now releasing hubot\/master to staging
# Let other people release
hubot done releasing foobar to staging
#=>foobar staging is now free for releases