📌 Add NodeJS version management and instructions (#551)

{{cookiecutter.project_slug}}/frontend/README.md

@@ -1,5 +1,20 @@
 # frontend
 
+## Node Requirements
+You can use either [fnm](https://github.com/Schniz/fnm) or [nvm](https://github.com/nvm-sh/nvm) to manage your Node.js versions.
+
+### Using nvm
+If you prefer nvm, run the following command to install the recommended Node.js version:
+```
+nvm install
+```
+
+### Using fnm
+If you prefer fnm, run the following command to install the recommended Node.js version:
+```
+fnm install
+```
+
 ## Project setup
 ```
 npm install