mention CLI options in README

Makefile

@@ -25,7 +25,7 @@ push: docker
 	docker push "$(IMAGE):$(TAG)"
 
 mock:
-	docker run -it -p 8080:8080 -e MOCK=true "$(IMAGE):$(TAG)"
+	docker run -it -p 8080:8080 "$(IMAGE):$(TAG)" --mock
 
 scm-source.json: .git
 	@echo '{"url": "$(GITURL)", "revision": "$(GITHEAD)", "author": "$(USER)", "status": "$(GITSTATUS)"}' > scm-source.json

README.rst

@@ -78,13 +78,13 @@ You can start the app in "mock mode" to see all UI features without running any
 
     $ pip3 install -r requirements.txt
     $ (cd app && npm start &)
-    $ MOCK=true python3 -m kube_ops_view
+    $ python3 -m kube_ops_view --mock --debug
 
 You can also run the latest Docker image directly:
 
 .. code-block:: bash
 
-    $ docker run -it -p 8080:8080 -e MOCK=true hjacobs/kube-ops-view
+    $ docker run -it -p 8080:8080 hjacobs/kube-ops-view --mock
 
 
 Building