fix: wrong content length

[scolastico]

Description

This PR refactors the UI container architecture to resolve a critical bug where config.json was being truncated in production environments.

The issue occurred because the previous Nitro-based server cached the Content-Length of the static config.json file during the build process. When the entrypoint script attempted to overwrite this file at runtime with environment variables, the server continued to serve only the original number of bytes, resulting in truncated/invalid JSON and the "API is not compatible" error.

Key Changes:

• Static Generation: Switched from nuxt build to nuxt generate to create a pure static export of the UI.
• Express Entrypoint: Introduced a dedicated Express server in the entrypoint/ directory. This server dynamically generates the config.json response, ensuring the Content-Length matches the runtime environment variables.
• Production Serving: The Express server serves the static assets from /app/public and handles SPA routing fallbacks to index.html.
• Dockerfile Refactor: Updated the Dockerfile to support the new build and execution flow, including pnpm support for the entrypoint dependencies.

Related Issue

Closes not-three/main#27

Checklist

• I have tested my changes locally
• I have updated the documentation if needed
• This PR follows the project's coding style

Additional Notes

• The entrypoint now resides in entrypoint/ with its own package.json and pnpm-lock.yaml for better isolation.
• The container path /app/public is used to host the static assets, maintaining consistency with existing documentation.

[github-actions]

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2026-02-01 11:46 UTC