My initial ZMK configuration for my Lily58 Pro. Not much changes, apart from adjusting the keymap. Will look more into it in the future.

Flash a new version

1. Make some awesome changes in the code, commit and push.
2. Go to the repo's Actions tab and download the latest firmware (it may take time to be generated).
3. Connect the left half with a good cable and press twice the reset button. It will mount the storage NICENANO.
4. Drag and drop the left .uf2 file. It will show a nasty error but it's fine.
5. Repeat for the right half.
6. LFG 🔥

Source: https://kriscables.com/zmk-firmware-nicenano/