update Go operator quickstart docs (#5636)

* update Go operator quickstart docs

Include steps for running the operator locally in the quickstart

Signed-off-by: Bryce Palmer <bpalmer@redhat.com>

* update docsy-install link

update the docsy-install link as it has moved to a new url

Signed-off-by: Bryce Palmer <bpalmer@redhat.com>

website/content/en/docs/building-operators/golang/quickstart.md

@@ -97,6 +97,24 @@ has a custom CA, these [configuration steps][image-reg-config] must be complete.
   make undeploy
   ```
 
+### Run locally (outside the cluster)
+
+This is recommended ONLY for development purposes
+
+1. Run the operator:
+
+  ```sh
+  make install run
+  ```
+
+1. In a new terminal tab/window, create a sample Memcached custom resource:
+  
+  ```console
+  $ kubectl apply -f config/samples/cache_v1alpha1_memcached.yaml
+  memcached.cache.example.com/memcached-sample created
+  ```
+
+1. Stop the operator by pressing `ctrl+c` in the terminal tab or window the operator is running in
 
 ## Next Steps