Enable source maps in production

[sarayourfriend]

Fixes

Fixes #754 by @sarayourfriend

Description

Enables source maps in production so that Sentry can use them for better stack traces in issues.

Does not effect the dev experience at all as they were already enabled in development, this PR just removes the "isDev" check that was guarding source map generation.

This will slightly slow down the production build but IMO that's the least concern (I'm more concerned that we're using production quality source maps in development and we could get a dev performance win if we switched to a different source map generation technique in dev, but that's another story altogether and our dev build is still pretty fast anyway).

Testing Instructions

Run pnpm build && pnpm start and verify that you can access the source maps in your browser.

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
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• My code follows the established code style of the repository.
• [N/A] I added or updated tests for the changes I made (if applicable).
• [N/A] I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.

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[zackkrida]

LGTM

[krysal]

Every piece of extra info for debugging is welcome 👍