Using RPICam, how to RO OS but leave WWW writable?

[Joulinar]

probably you could have a look to following post. It might give you an idea on what is possible. I guess you would need to adjust the proposed solution and add the required folder.

OverlayFS on DietPi with LXDE

I tried the overlayroot project @ https://github.com/chesty/overlayroot. I found it’s method of writing to the lower level via chroot too much of a PITA. I ended up using instructions from https://www.domoticz.com/wiki/Setting_up_overlayFS_on_Raspberry_Pi. It has overlayfs for /home and /var with everything else mounted readonly. A job at shutdown syncs /home and /var back to the lower filesystem. Some of the locations from the author’s git repo have moved. I did a git clone, and then use…