This is the Hello World of receivers for Tidelift webhooks. It is built to run as a Google Cloud function, receive a webhook, validate the signature, and log the event type. Real usage would also then involve looking at the event type and doing something as a result.
To use this, you'll need to create a Cloud Function similar to the example in the Google Cloud documentation and set an environment variable for your function named TIDELIFT_SIGNING_SECRET which is set to the signing secret for your webhook.