Merge pull request #3447 from SonyaCode/patch-1

Update installation.md

Author: raclim

Diff for: contributor_docs/installation.md

@@ -6,7 +6,7 @@ Follow these instructions to set up your development environment, which you need
 
 _Note_: The installation steps assume you are using a Unix-like shell. If you are using Windows, you will need to use `copy` instead of `cp`.
 
-1. Install Node.js. The recommended way is to Node through [nvm](https://github.com/nvm-sh/nvm). You can also install [node.js](https://nodejs.org/download/release/v16.14.2/) version 16.14.2 directly from the Node.js website.
+1. Install Node.js. The recommended way is to Node through [nvm](https://github.com/nvm-sh/nvm). You can also install [node.js](https://nodejs.org/download/release/v16.14.2/) version 16.14.2 directly from the Node.js website. To check if you already have Node installed on your computer, run `$ node -v`.
 2. [Fork](https://help.github.com/articles/fork-a-repo) the [p5.js Web Editor repository](https://github.com/processing/p5.js-web-editor) into your own GitHub account.
 3. [Clone](https://help.github.com/articles/cloning-a-repository/) your new fork of the repository from GitHub onto your local computer.
 
@@ -29,12 +29,12 @@ _Note_: The installation steps assume you are using a Unix-like shell. If you ar
 9. (Optional) Update `.env` with necessary keys to enable certain app behaviors, i.e. add Github ID and Github Secret if you want to be able to log in with Github.
    * See the [GitHub API Configuration](#github-api-configuration) section for information on how to authenticate with Github.
    * See the [S3 Bucket Configuration](#s3-bucket-configuration) section for information on how to set up an S3 bucket
-11. Run `$ npm run fetch-examples` to download the example sketches into a user called 'p5'. Note that you need to configure your GitHub Credentials, which you can do by following the [Github API Configuration](#github-api-configuration) section.
-12. Enable Prettier in your text editor by following [this guide](https://prettier.io/docs/en/editors.html).
-13. `$ npm start`
-14. Navigate to [http://localhost:8000](http://localhost:8000) in your browser
-15. Install the [React Developer Tools](https://chrome.google.com/webstore/detail/react-developer-tools/fmkadmapgofadopljbjfkapdkoienihi?hl=en)
-16. Open and close the Redux DevTools using `ctrl+h`, and move them with `ctrl+w`
+10. Run `$ npm run fetch-examples` to download the example sketches into a user called 'p5'. Note that you need to configure your GitHub Credentials, which you can do by following the [Github API Configuration](#github-api-configuration) section.
+11. Enable Prettier in your text editor by following [this guide](https://prettier.io/docs/en/editors.html).
+12. `$ npm start`
+13. Navigate to [http://localhost:8000](http://localhost:8000) in your browser
+14. Install the [React Developer Tools](https://chrome.google.com/webstore/detail/react-developer-tools/fmkadmapgofadopljbjfkapdkoienihi?hl=en)
+15. Open and close the Redux DevTools using `ctrl+h`, and move them with `ctrl+w`
 
 ## Docker Installation