installation instructions needed

The readme talks about docker. I’m not a docker user. I did a git clone when I was on a decent connection. ATM I’m not on a decent connection. The releases page lacks file sizes. And MS Github conceals the size:

curl -LI 'https://github.com/Xyphyn/photon/archive/refs/tags/v1.31.2-fix.1.tar.gz' | grep -i 'content-length'

output:

content-length: 0

So instead of fetching the tarball of unknown size, I need to know how to build either the app or the tarball from the cloned repo. Is that documented anywhere?