Uplift the nodejs install in the server Dockerfile

[vodorok]

When building the docker image, the following warning message appears:

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                       SCRIPT DEPRECATION WARNING                    

This script, located at https://deb.nodesource.com/setup_X, used to install Node.js is deprecated now and will eventually be made inactive.

Please visit the NodeSource distributions Github and follow the instructions to migrate your repo. https://github.com/nodesource/distributions

The NodeSource Node.js Linux distributions GitHub repository contains information about which versions of Node.js and which Linux distributions are supported and how to install it. https://github.com/nodesource/distributions

                      SCRIPT DEPRECATION WARNING

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

TO AVOID THIS WAIT MIGRATE THE SCRIPT Continuing in 60 seconds (press Ctrl-C to abort) ...

Installing the NodeSource Node.js 16.x repo...

As per instructions in the warning message, the nodejs installation method should be uplifted.