Add x-ui.service.arch file (#3650)

* Add a service file for Arch-based OSs

* Update release.yml with arch service file

* Update x-ui.service.arch

x-ui.service.arch

@@ -0,0 +1,16 @@
+[Unit]
+Description=x-ui Service
+After=network.target
+Wants=network.target
+
+[Service]
+EnvironmentFile=-/etc/conf.d/x-ui
+Environment="XRAY_VMESS_AEAD_FORCED=false"
+Type=simple
+WorkingDirectory=/usr/lib/x-ui/
+ExecStart=/usr/lib/x-ui/x-ui
+Restart=on-failure
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target