chore: parameterize Node.js 22 in .node-version file

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version-file: .node-version
       - name: Cypress test
         uses: cypress-io/github-action@v6
         with:

.node-version

@@ -0,0 +1 @@
+22

readme.md

@@ -3,5 +3,7 @@
 This repo contains completed versions of the quickstart apps from the component
 testing quickstart guides at [https://docs.cypress.io/guides/component-testing/getting-started](https://docs.cypress.io/guides/component-testing/getting-started)
 
+Use the recommended version of [Node.js](https://nodejs.org/en/) as shown by the file [.node-version](./.node-version) contents. [node-version-usage](https://github.com/shadowspawn/node-version-usage) contains a list of Node.js version managers that read and use the contents of a [.node-version](./.node-version) file to install and use the specified version.
+
 Visit [docs.cypress.io](https://docs.cypress.io) for more information on
 component testing with Cypress.