Change check for update condition

Instead of fetching from remote, it now only compares HEAD from local to HEAD of the current branch on remote

update.sh

@@ -2,7 +2,11 @@
 
 cd $(dirname $0)
 
-if [[ $(git fetch) ]]; then
+local_head=$(git rev-parse HEAD)
+upstream_ref=$(git rev-parse --abbrev-ref @{u} | sed 's/\// /')
+remote_head=$(git ls-remote $upstream_ref | cut -f1)
+
+if [[ $local_head != $remote_head ]]; then
   git pull
   docker compose pull
   docker compose up -d