Update pialert-install.sh

- add crontab
- fixes https://github.com/tteck/Proxmox/issues/1806

install/pialert-install.sh

@@ -70,6 +70,8 @@ for file in pialert.vendors.log pialert.IP.log pialert.1.log pialert.cleanup.log
     ln -s "$src_dir/$file" "$dest_dir/$file"
 done
 sed -i 's#PIALERT_PATH\s*=\s*'\''/home/pi/pialert'\''#PIALERT_PATH           = '\''/opt/pialert'\''#' /opt/pialert/config/pialert.conf
+sed -i 's/~/\/opt/g' /opt/pialert/install/pialert.cron
+(crontab -l 2>/dev/null; cat /opt/pialert/install/pialert.cron) | crontab -
 echo "python3 /opt/pialert/back/pialert.py 1" >/usr/bin/scan
 chmod +x /usr/bin/scan
 echo "/opt/pialert/back/pialert-cli set_permissions --lxc" >/usr/bin/permissions