chore(docs): Update "Set Node.js version" cloud (#37924)

Co-authored-by: Lennart <lekoarts@gmail.com>

docs/docs/how-to/cloud/set-node-version.md

@@ -3,20 +3,35 @@ title: "Set a Node.js Version for Your Site"
 description: "Learn how to set a Node version for your Gatsby Cloud site."
 ---
 
-## Introduction
+## Instructions
 
-You can specify a Node.js version for site in Gatsby Cloud in two different ways, by environment variable or `.nvmrc` file. If you don't set a Node version, Gatsby cloud will use Node 18 by default.
+You can specify a [Node.js](https://nodejs.org/en) version for your site in Gatsby Cloud in two different ways:
+
+- Through an environment variable
+- With a `.nvmrc` file
+
+If you don't explicitly set a Node.js version yourself, Gatsby Cloud will use its default version (current minimum supported Node.js version by Gatsby).
 
 ### Environment variable
 
 You can set your Node.js version using the `NODE_VERSION` environment variable inside Gatsby Cloud. Read more about [setting environment variables](/docs/reference/cloud/managing-environment-variables).
 
 ### Using nvm
 
-You can include a `.nvmrc` file in your project repository, and Gatsby Cloud will read the Node version from that file.
+You can include a `.nvmrc` file in your project repository and Gatsby Cloud will read the Node.js version from that file.
 
-Example format:
+An example file could look like this:
 
 ```javascript:title=.nvmrc
 v18.9.0
 ```
+
+You can write out the version you're currently using locally like this:
+
+```shell
+node -v > .nvmrc
+```
+
+## Troubleshooting
+
+Sometimes Gatsby Cloud is not recognizing your new Node.js version after you set it. In those instances, try disabling your builds and preview (find them under "Site Settings" > "Builds") and then re-enabling them. This will reset your build container and make sure to use your new Node.js version.