chore: sync submodule state (parent ref update)

Made-with: Cursor

deployment/common/systemd-api-service.example

@@ -0,0 +1,21 @@
+# Example systemd unit for a REST API (e.g. explorer API on port 8080)
+# Copy to /etc/systemd/system/explorer-api.service and adjust paths/env.
+
+[Unit]
+Description=Explorer REST API
+After=network.target postgresql.service
+
+[Service]
+Type=simple
+User=explorer
+WorkingDirectory=/opt/explorer
+Environment=PORT=8080
+Environment=DB_HOST=localhost
+Environment=DB_NAME=explorer
+Environment=CHAIN_ID=138
+ExecStart=/opt/explorer/bin/api-server
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target