Trigger automatic deploy when merges are done to staging

[iprunache]

Why

Developers should be able to test changes being merged into staging as fast as possible so they can get feedback in a timely manner.

What

• after a staging image is built, trigger the nrgi-dcos project in Shippable that deploys the new image to the staging environment
  • create the CURL to trigger the deploy project
  • pass project(name, branch and SHA of latest commit) info to the deploy project

Notes

The deploy is being done on the experimental ECS infrastructure at first.