!build: require node 18 to install bbb packages

[antobinary]

What does this PR do?

Closes Issue(s)

Closes # none
Related #18680

Motivation

Without this step existing BigBlueButton 2.6 servers will upgrade to 2.6.14 fine but the system NodeJS installed and used for our packages will remain v16.

With this change, the following message will be displayed and will block the install

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 bbb-export-annotations : Depends: nodejs (>= 18)
E: Unable to correct problems, you have held broken packages.

More

• Added/updated documentation

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
5 Code Smells

No Coverage information
8.5% Duplication

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