Looks like you got sucked into the fastn world. It's an open source full stack web development programming language we have created: fastn.com. We are building some fastn powered full stack, reusable apps, that you can plug in any fastn powered website at https://github.com/fifthtry-community.

The website, kulfi.app and malai.sh, and fastn.com itself, and FifthTry.com as well are all built using fastn.