fix: specify range of node versions in readme and advise cd into package

[jordaniza]

Description

Changes in the package README files for new contributors. Full
details here

Warn users about certain node versions:

I decided to avoid an .nvmrc or any package.json engines because dependencies may be updated shortly and I don't want to break downstream users CI pipelines. A readme will suffice for now

Task ID: OS-1036

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran all tests with success and extended them if necessary.
• I have updated the CHANGELOG.md file in the root folder.
• I have updated the DEPLOYMENT_CHECKLIST file in the root folder.
• I have updated the UPDATE_CHECKLIST file in the root folder.

[CLAassistant]

All committers have signed the CLA.