feat(helm): service - disable metrics by default

Author: alhendrickson

deployment/kubernetes/charts/medcat-service-helm/values.yaml

@@ -15,7 +15,7 @@ image:
   # tag: "latest"
 
 env:
-  APP_ENABLE_DEMO_UI: "true"
+  APP_ENABLE_DEMO_UI: true
 
   # This defines the Model Pack used by the medcat service
   APP_MEDCAT_MODEL_PACK: "/cat/models/examples/example-medcat-v2-model-pack.zip"