Describe the Bug

Is there an easy way to determine if a HTTP request is a CloudEvent or not?

It would be great if there was a isCloudEvent function or something similar. Maybe just documentation if we can re-use existing functions together to achieve this.

Steps to Reproduce

• Try to find a function to determine if a HTTP request is a valid CE

Expected Behavior

• Documentation in the main README for how to determine if a HTTP req is a CE