Do not call chdir to run server

[dolfinus]

Checklist

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• Read and understand the [Code of Conduct][code-of-conduct].
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Description

What is the purpose of this pull request?

This pull request:

• Replaces executing chdir with just passing an extension folder as an argument for uvicorn script.

Related Issues

Does this pull request have any related issues?

This pull request:

• I've faced a new issue: every new terminal window in the running notebook is opening in the jupyterlab_commenting extension folder. Now it's fixed.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

[dolfinus]

TS tests are not running but this is not related to changes I've made.

[dolfinus]

@saulshanabrook Could you please take a look at this PR?