Adding comments to a static blog with Mastodon
I achieve this using https://brid.gy/ (or https://fed.brid.gy/ if you want your blog to appear as a first class member of the Fediverse), though in my case I just syndicate out to Twitter.  I then collect the webmentions using https://webmention.io/.The nice thing about this is I get a breadth of methods for receiving comments/reactions across multiple platforms, including anything that directly supports webmention (such as https://micro.blog/, where my posts are also syndicated), without having to do any of the platform-specific wiring myself.