small tweak to quickstart section

README.md

@@ -40,7 +40,11 @@ above by running `sudo make dependencies`.
     cp git-daemon.service /etc/systemd/system/
     ufw allow 9418
     systemctl enable --now git-daemon.service
-    su - git
+    su git
+    cd
+    mkdir .ssh && chmod 700 .ssh
+    touch .ssh/authorized_keys && chmod 600 .ssh/authorized_keys
+    add your public ssh key to .ssh/authorized_keys
     mkdir projects
     clone this repository
     cd into this repository