add configuration

_posts/2024-07-07-atuin-pi.md

@@ -22,6 +22,15 @@ and
 can be seen in my [dotfiles](https://github.com/gierdo/dotfiles). But the
 [documentation](https://docs.atuin.sh/guide/installation/) is excellent.
 
+In case you are wondering why the sync configuration is not in my config: I try
+to keep all specific configuration of stuff that is not publicly available and
+might not be needed in all my environments outside of the dotfiles. I set
+`$ATUIN_SYNC_ADDRESS` in my `~/.profile.local`.
+
+```text
+export ATUIN_SYNC_ADDRESS=http://raspberrypi.local:8888
+```
+
 Atuin offers a free synchronization server at <https://api.atuin.sh>. Yes, it's
 not a good idea to show and open up your command history to everybody. Which is
 why the synchronization is completely end-to-end encrypted by atuin. The