Add a TODO file.

TODO.org

@@ -0,0 +1,5 @@
+* to-do
+** Switch to overlay driver when zfs 2.2 is released
+This might fix some stability issues (like a container getting stuck in a terminating state), may improve performance (since the zfs driver is noticably slower than overlay on ext4 on a zvol), and will avoid a lot of noise in my zfs dataset lists
+
+ref: https://github.com/moby/moby/issues/40132