add support for tag based (pre) filtering for API endpoints

[thescientist13]

In support of the new Tuesday's Tunes website project, it would be nice if only a subset of the content could be returned to help with pre-filtering the results when calling on data.

Ideally, it would be great to

1. Add a Tags content type in Contentful and pre-fill it with some values like tt for Tuesday's Tunes
2. Return the tags in the response
3. Enable the API to accept that filter via query param and pre-sort it

[thescientist13]

Next time, don't forget to add this cache key to CloudFront 🤦

Was still getting "hits" for filtered events

Once I add configured it in CloudFront, all was better. 😮‍💨