If you're going to do that, simpler to just use `qrencode` with the same contents as this is using:

    WIFI:T:WPA;S:${ssid};P:${password};;

Unless you need to frequently generate WiFi login QR codes (single purpose!) from a device without a convenient command line, e.g. mobile, there's not really a reason to self-host this.

(It makes sense for OP/the project to host it as a demo and for people who don't care or trust it to use though - I'm not hating on the site existing.)