Nodesource repo deprecation warning

[cmrxnn]

In the community guides (specifically 'Building panel assets'), there is a command to install NodeJS v16 in order to build the panel:

curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash -

This script now throws a deprecation warning as follows:

Solution to this issue: Changing the method of installing NodeJS on the documentation so users don't use a deprecated (or, at some point, non-functional) install script for NodeJS

[Jcodeerd]

Will be fixed by #542

[cmrxnn]

Probably should've checked the PR's before creating an issue...

I'll leave this here for tracking purposes and then it can either be closed now or when the PR is merged

[PadowYT2]

Probably should've checked the PR's before creating an issue...

I'll leave this here for tracking purposes and then it can either be closed now or when the PR is merged

If the PR will be merged, GitHub will automatically close this issue. I have added this issue to the PR