I thought finally I was able to figure out the command lines from the github README file but then when I was in
$ yarn in the 2nd step of installation then I got stuck on here:
https://i.imgur.com/ZVGFgyu.pngI had that too but I don't recall what I did to get past it. I think bcrypt needs to be installed separately, not sure.
What is the extension of the index file on the web? As open source I was expecting PHP.
It's built on node.js so maybe index.js would be the "index file" but it's a completely different environment from PHP.