Support newer versions of nodejs.

[bpblanken]

Is your feature request related to a problem? Please describe.
The local development server does not work with more recent versions of node due to this issue.

Describe the solution you'd like
Update the seqr packages and docker image to use a more recent version of nodejs...the most recently released version is 20.

Describe alternatives you've considered
In theory export NODE_OPTIONS=--openssl-legacy-provider or force-downgrading nodejs works... but there's potential security issues etc.

[karynne7]

We're getting deprecation warnings for nodejs. I think this update should be bumped to a higher priority. Thanks!

================================================================================

                          DEPRECATION WARNING                            

Node.js 14.x is no longer actively supported!

You will not receive security or critical stability updates for this version.

You should migrate to a supported version of Node.js as soon as possible.
Use the installation script that corresponds to the version of Node.js you
wish to install. e.g.

• https://deb.nodesource.com/