Update install.func

- globally add update command

misc/install.func

@@ -143,4 +143,6 @@ EOF
     systemctl restart $(basename $(dirname $GETTY_OVERRIDE) | sed 's/\.d//')
     msg_ok "Customized Container"
   fi
+  echo "bash -c \"\$(wget -qLO - https://github.com/tteck/Proxmox/raw/main/ct/${app}.sh)\"" >/usr/bin/update
+  chmod +x /usr/bin/update
 }