call git pull directly from unit file

importers/nginx-updater.sh

-#!/bin/bash
-
-cd /data/per-user/$USER/nginx/data/www-content && git pull

unit-files/nginx-gitpuller@.service

@@ -5,8 +5,7 @@ Description=nginx git puller
 Before=nginx@%i.service
 
 [Service]
-Environment=USER=%i
-ExecStart=/data/indiehosters/importers/nginx-updater.sh
+ExecStart=cd /data/per-user/%i/nginx/data/www-content && git pull
 
 [Install]
 WantedBy=nginx@%i.service