Add information on creating Read-Only filesystems

[aallan]

How read only filesystems work has changed in Bookworm. See raspberrypi/bookworm-feedback#137 for details. More details need adding to the documentation. There is already something in raspi-config about the overlay filesystem,

but this option doesn't necessarily do what some end users would expect. Should add more information to this section I guess?

[lurch]

It's not only in raspi-config, it's also in the Raspberry Pi Configuration GUI tool.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[aallan]

Too soon Github bot, too soon.

[theepicflyer]

Agree! I just spent an afternoon figuring out how to set overlayroot to overlay just root and not /home. I have a separate /home partition and want to keep that writable for user data.

Mainly I was misled by this project on github also called overlayroot. I thought this was overlayroot and tried to customize it this way. The Debian cloud-initramfs-tools does not come up in a Google search, and I only found it after I went through the Debian package browser.

Please add documentation to customize overlayroot!

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.