Update README.md

Author: bmuenzenmeyer

README.md

@@ -36,6 +36,7 @@ The below assume a new directory and project is required.
     ```
     > If you get an error stating that `npx` is not installed, ensure you are on `npm 5.2.0` or later by running `npm -v` or install it globally with `npm install -g npx`. [Learn more about npx.](https://medium.com/@maybekatz/introducing-npx-an-npm-package-runner-55f7d4bd282b)
 1. Follow the on-screen prompts to choose your Edition and a Starterkit should you want one.
+1. Run `npm install` one last time to ensure any transient packages from the CLI are installed.
 1. Open `package.json` and add the following to your `scripts` object
     ```diff
     "scripts": {