add config to set homepage image

cluster/apps/homepage/homepage.yml

@@ -78,10 +78,15 @@ spec:
               subPath: widgets.yaml
             - mountPath: /app/config/logs
               name: logs
+            - mountPath: /app/public/images
+              name: images
       volumes:
         - name: homepage-config
           configMap:
             name: homepage
+        - name: images
+          persistentVolumeClaim:
+            claimName: longhorn-homepage
         - name: logs
           emptyDir: {}
         - name: tmp