GITHUB_TOKEN - OAuth token generated on GitHub which does not require any special permissions
Used to interact with the GitHub API, although not required it will help avoid limiting
SLACK_WEBHOOK_URL - The webhook URL for sending Slack messages to
DEPENDAPANDA_SECRET - Secret token for manually requesting Slack messages
If you find yourself being rate limited by GitHub - you can define the GITHUB_TOKEN environment variable.
This needs to be a token generated from GitHub, however as the repositories are all public it needs no special