I tried searching techmids.io and techmids.io/blog on Feedly to subscribe to the RSS feed but it was unable to find it.
It looks like https://techmids.io/rss/feed.xml is where they are kept. Something like this meta tag could be applied to the base html:
<link rel="alternate" type="application/rss+xml" title="TechMids" href="https://github.com/rss/feed.xml" />
I'm happy to make a PR for it if you want.