fix(dev): statically serve built assets from dev server

[pcattori]

Closes: #

• Docs
• Tests

Testing Strategy:

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Latest commit: 5b12960

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes changesets to release 18 packages

Name	Type
@remix-run/dev	Minor
@remix-run/server-runtime	Minor
create-remix	Minor
@remix-run/css-bundle	Minor
@remix-run/cloudflare	Minor
@remix-run/deno	Minor
@remix-run/node	Minor
@remix-run/react	Minor
@remix-run/cloudflare-pages	Minor
@remix-run/cloudflare-workers	Minor
@remix-run/architect	Minor
@remix-run/express	Minor
@remix-run/netlify	Minor
@remix-run/serve	Minor
@remix-run/testing	Minor
@remix-run/vercel	Minor
remix	Minor
@remix-run/eslint-config	Minor

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