Installation Guide Improvement for Node.js Section

[SonyaCode]

Increasing Access

This improvement would help beginners unfamiliar with Node.js or who already have an existing Node.js version on their computer to install Node.js when they are following the Installation Guide.

Feature enhancement details

For step 1, I plan to add an extra bullet point on how to check if the user already has Node.js installed on their computer.

I plan to add this because when I followed the Installation Guide, I forgot that I already have a different version of Node.js installed on my computer, so I was struggling to install Node 16.14.2. In order to check Node.js, I put in the command node -v.

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