Put adb command on GitHub

Just a tiny thing:
When I wanted to run the adb command from my computer I was looking it up on F-Droid and then Github, but it was not there.

I ended up copying it here from one of the issues because I was too lazy to manually type it in from the app or send it to my pc some way from my phone.

So maybe include the necessary command in the readme here? Closer to the place you need to type it.