Add notes about the hook

README.md

@@ -74,3 +74,10 @@ We have a Git hook setup, so just push as you would as normal:
 ```
 $ git push origin master
 ```
+
+Details for maintaining the hook on the Varia server are:
+
+* We have cloned the site in `/srv/gitea/clones/homebrewserver.club`
+* We have create a hook deployment script in `/srv/gitea/gitea-repositories/varia/homebrewserver.club.git/hooks/post-update`
+
+How it works: when someone runs a `git push origin master`, the script in the `post-update` will run after the updating is finished. In this script, we run all the steps to publish the site as per usual. Such as running `pip install -r requirements.txt` and `pelican` to generate the new output.