charts: Make the plugins-dir arg configurable

this patch removes the hard coded value for plugins-dir
and make the value configurable
Signed-off-by: Santhosh Nagaraj S <santhosh@kinvolk.io>

charts/headlamp/templates/deployment.yaml

@@ -37,7 +37,9 @@ spec:
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           args:
             - "-in-cluster"
-            - "-plugins-dir=/headlamp/plugins"
+            {{- with .Values.config.pluginsDir}}
+            - "-plugins-dir={{ . }}"
+            {{- end }}
             {{- with .Values.config.oidc.clientID }}
             - "-oidc-client-id={{ . }}"
             {{- end }}

charts/headlamp/values.yaml

@@ -37,6 +37,7 @@ config:
     issuerURL: ""
     # -- OIDC scopes to be used
     scopes: ""
+  pluginsDir: "/headlamp/plugins"
 
 serviceAccount:
   # -- Specifies whether a service account should be created