message: Update install and troubleshooting instructions
diff: @@ -124,6 +124,15 @@ This will create a new deployment and alias it to its production URL, [primer-co
  ### Path aliasing
  This site is served as a subdirectory of [primer.style] using a [path alias](https://zeit.co/docs/features/path-aliases) configured in that repo's [`rules.json`](https://github.com/primer/primer.style/tree/master/rules.json). If you change the production deployment URL for this app, you will also need to change it there and re-deploy that app; otherwise, Now will automatically route requests from [primer.style/components](https://primer.style/components/) to the new deployment whenever you alias this one to `primer-components.now.sh`.
  +## Troubleshooting
  +
  +**`npm start` fails with an error like `gatsby: command not found`**
  +
  +Make sure to run `npm install` from inside the `docs/` subfolder *as well as* the root folder.
  +
  +**`npm start` fails with a different error**
  +
  +Ensure you are using the latest minor of Node.js for the major version specified in the `.nvmrc` file. For example, if `.nvmrc` contains `8`, make sure you're using the latest version of Node.js with the major version of 8.
  ## Glossary
  