feat: add order precedence in systemd units

Author: lucarin91

debian/router/etc/systemd/system/arduino-router.service

@@ -1,8 +1,11 @@
 [Unit]
 Description=Arduino Router Service
+After=network-online.target
+Wants=network-online.target
+Requires=
 
 [Service]
-ExecStart=/usr/bin/router --listen-port :8900 --serial-port /dev/ttyACM0
+ExecStart=/usr/bin/router --listen-port :8900 --unix-port /run/arduino-router.socket --serial-port /dev/ttyHS1
 StandardOutput=journal
 StandardError=journal
 Restart=always