message: Fixed output variable name in curl command
  The variable used in the curl command is currently called `frontendIP` rather than `frontendAddress` which it should be to match the code above.
diff: @@ -84,7 +84,7 @@ npm install
  can use `curl` and `grep` to retrieve the `<title>` of the site the proxy points at.
  ```sh
  - $ curl -sL $(pulumi stack output frontendIp) | grep "<title>"
  + $ curl -sL $(pulumi stack output frontendAddress) | grep "<title>"
  <title>Node/Angular Todo App</title>>
  ```
  