Merge branch '305-use-prometheus-default-securitycontext' into 'master'

Resolve "Use prometheus' default securityContext"

Closes #305

See merge request openappstack/openappstack!97

helmfiles/values/prometheus.yaml.gotmpl

@@ -28,13 +28,6 @@ prometheus:
           resources:
             requests:
               storage: 5Gi
-    # https://github.com/rancher/rancher/issues/14836 prevents 'subPath' to work
-    # with non-privileged users. This is an insecure workaround for the time
-    # being...
-    securityContext:
-      runAsUser: 0
-      fsGroup: 0
-      runAsNonRoot: false
   service:
     type: NodePort