[README] Add nodejs as a system requirement

[johnsaigle]

Brief summary of changes

As of (at least) version 21, it's necessary to use new-ish versions of NodeJS in order to properly package and run the LORIS front-end React components.

In lieu of a package or container or bootstrapping post-install script, we should at least make it clear that this is as essential to getting a non-development LORIS started as MySQL, Apache, etc.

[driusan]

How did you come to the conclusion 8.0 was the minimum version?

[johnsaigle]

Truthfully I haven't done extensive testing.

v10 is the latest LTS though and v12 is current so I think v8 is an appropriate ask.

[christinerogers]

Looks good to me.

Question, just to check:
The following line: are we still asking people to run composer --no-dev if make does it for them?

because i spotted something.

[johnsaigle]

@christinerogers No I don't think running composer directly is necessary anymore.

[christinerogers]

Thanks for this PR, John.
The change looks good to me (I cannot vet the version number however), and at the same time let's update:

• Remove line about running composer with --no-dev, if no longer relevant
• Version 20 -> to 21 (rebase?)
• The extreme bolding that is applied to Line 3 on the first paragraph, added by [Readme] Reformatting, add "Contributing" and "Help" sections #4082 for 20.3 -- This seems to be a by-product of adding the build status. if not intentional, could you find a way to remove this formatting: prob just move --- above the text

[christinerogers]

I'll add a followup issue for the CentOS readme. If it should be tagged bugfix or critical to release please do.

[johnsaigle]

@christinerogers I made the changes you asked for. Please feel free to edit the doc directly for small changes like this. It probably makes more sense to do that than to leave a note asking me to do it.