Implement auditjs and migrate from http-server to local-web-server

[rav-pradhan]

What

• Implemented auditjs as our vulnerability auditing tool instead of npm audit. This is to provide us with the flexibility to manage an allowlist for any vulnerabilities we want to bypass.

• Owing to running auditjs, it was noted that http-server has a vulnerability which has been unpatched. It is around the ecstatic dependency. On further reading, it looks like ecstatic has been deprecated since May 2019. It doesn't look like http-server has been updated to account for this. On that note, this PR also includes a change from http-server to local-web-server for the development server. As I understand, there shouldn't be any differences than with using http-server, other than the API. I was able to still link to the main.css served at localhost:9001.

How to review

Check that the audit command runs as intended

Check that local-web-server works as a suitable replacement for http-server

Who can review

Anyone