I don't know of a guide, off-hand. I saw it done before in postmarketOS [0], which is what made me think of it. Note that pmOS does it to call an actual init

I don't know of a guide, off-hand. I saw it done before in postmarketOS [0], which is what made me think of it. Note that pmOS does it to call an actual init system, but it could be done as an init in and of itself. 0: https://gitlab.com/postmarketOS/pmaports/tree/master/main/postmarketos-mkinitfs https://gitlab.com/postmarketOS/pmaports/tree/master/main/po...