[BUG]: Fix & make the current CI/CD pipeline more robust

[Jarmos-san]

What happened?

Currently the CI/CD pipeline isn't only inefficient but it doesn't work as expected either. Following are the intended behaviour but for whatever reason it doesn't work:

• Deploy to Netlify using GitHub Actions (causes an authentication issue even the auth tokens exists)
• Make a comment on the PR with a preview URL

The expected behaviour is basically to deploy the static contents to Netlify after they've been generated on the GitHub Actions environment. Once the deployment is successful, comment on the PR with a preview URL.

Relevant log output

See https://github.com/developersIndia/website/runs/5703328348?check_suite_focus=true

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[Jarmos-san]

Here's an official blog from GitHub which might share a clue towards fixing this issue; GitHub Actions improvements for fork and pull request workflows