Thanks for taking the time to implement the feature.

I left a few comments. They are all with the intent of improving the default UX of a Gatus user. Let me know what you think.

I'll look at this tomorrow and do some manual testing to see if there are issues (e.g. configure locally, run status, let it resolve alerts).

Thanks for adding the source-url and metadata, I did a small manual test with a config and was able to validate the metadata/attributes and source-url.

This is what an alert looks like:

LGTM, I think this would deploy without issue for our usecase.