Add notes on 3rd party app update

docs/auto_updates.md

@@ -12,5 +12,14 @@ nano -w /etc/apt/apt.conf.d/50unattended-upgrades
     Unattended-Upgrade::Automatic-Reboot-Time "02:00";
 nano -w /etc/apt/apt.conf.d/20auto-upgrades
 unattended-upgrades --dry-run --debug
+cat > /usr/local/bin/3rd_party_app_updates.sh <<EOF
+#!/bin/bash
+curl -fsSL https://filebrowser.org/get.sh | bash
+restic self-update
+curl https://rclone.org/install.sh | bash
+EOF
+chmod a+x /usr/local/bin/3rd_party_app_updates.sh
+crontab -e
+0 7 14 * * /usr/local/bin/3rd_party_app_updates.sh
 
 ```