I wanted to generate a static QR code rather than time-limited Lightning invoice to allow readers to tip bitcoin on Substack (where you can't access the code). Since I couldn't find an easy guide for people relatively new to Lightning, I decided to write one myself once I figured it out (with LNbits).
Too basic for all you wizards, of course, but I hope it helps someone and let me know if you spot anything I got wrong!
Also shout-out to these articles: