message: Fix typo
  This commit fixes a typo on the start page.
diff: @@ -116,7 +116,7 @@ And now you can execute it with::
  $ docker run -d --name envoy -p 9901:9901 -p 10000:10000 envoy:v1
  -And finally test is using::
  +And finally, test it using::
  $ curl -v localhost:10000
  