[CL-4191] Install Node.js using `apt-get install` in Dockerfile's

[adessy]

According to Node.js documentation:

The installation scripts setup_XX.x are no longer supported and are not needed anymore, as the installation process is straightforward for any RPM and DEB distro.

Those scripts will be eventually made inactive. Furthermore, to encourage people to stop using them, the scripts wait (suspend the execution) for 60 seconds before resuming the installation.

Changelog

Technical

• Install Node.js (for mjml) in back-end Dockerfiles using apt-get instead of the previous installation script that's now deprecated.

[cl-dev-bot]

	Messages
:book:	Changelog provided 🎉
:book:	Jira issue: CL-4191
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