add metrics to sfu service

Author: gaelgatelement

charts/matrix-stack/templates/matrix-rtc/sfu_service.yaml

@@ -21,6 +21,9 @@ spec:
   - name: http
     port: 7880
     targetPort: http
+  - name: metrics
+    port: 6789
+    targetPort: metrics
   selector:
     app.kubernetes.io/instance: "{{ $.Release.Name }}-matrix-rtc-sfu"
 {{- end -}}