fix: Pin node version to 14.18.1 in Dockerfile

[onuzbee]

Fixes

Closes DII-162. Tested basic functionality of CLI.

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

If you have questions, please file a support ticket, or create a GitHub Issue in this repository.

[shrutiburman]

Is there a reason why would we need to pin it to patch level granularity, in general?

I understand that after 14.18.1, the version was bumped up to 15 an so on.

[kridai]

So we are following the LTS release(Long term support), and the latest version of it is what @onuzbee has added which is 14.18.1, once the newer version starts supporting LTS, we would then have to update it, but for now the latests is for 14.18.1.

[onuzbee]

++