fix: add service management commands to deployment pipeline

Co-authored-by: Copilot <copilot@github.com>

.drone.yml

@@ -21,6 +21,9 @@ steps:
       - cp backend/short-link-server /opt/short-link/short-link-server.new
       - cp -r frontend/dist/* /opt/short-link/frontend/
       - mv /opt/short-link/short-link-server.new /opt/short-link/short-link-server
+      - cp short-link.service /etc/systemd/system/short-link.service
+      - systemctl daemon-reload
+      - systemctl enable short-link
       - systemctl restart short-link
       - systemctl reload caddy
     depends_on: