Pivotal Tracker Status Checks is a Github App that listens for webhooks from Pivotal Tracker stories. It then checks the pull requests attached to the story and adds a Github Status Check to each pull request with the status of the story.
PTSU_APP_ID - Github App App ID
PTSU_PRIVATE_KEY - Github App Private Key String
PTSU_INSTALL_LOGIN - Github App Installation Login
PTSU_PIVOTAL_PROJECT_ID - Pivotal Tracker Project ID
PTSU_PIVOTAL_TOKEN - Pivotal Tracker API Token