rsbuild build command does not exit when ran inside docker using bun.

[m4r1vs]

What version of Bun is running?

1.1.18+5a0b93523 (inside Docker image oven/bun:alpine, oven/bun:1 and oven/bun:debian)

What platform is your computer?

Linux 6.5.0-41-generic x86_64 x86_64 running Docker version 27.0.1, build 7fafd33

What steps can reproduce the bug?

1. Create Rspack project with bun create rsbuild@latest.
2. Create following Dockerfile:

FROM oven/bun:alpine as webinterface-builder

COPY rspack-project /app/rspack-project

WORKDIR /app/rspack-project

RUN bun install
RUN bun run build
CMD ["echo 'never reached'"]

3. Run docker build -t my-container .
4. Observe that the project is build correctly but the container creation is stuck after bun run build and "never reached" is never printed.

What is the expected behavior?

The docker image builds and is not stuck.

What do you see instead?

 => => #   dist/static/js/index.8b25dab0.js           24.8 kB     7.9 kB
 => => #   dist/static/js/lib-polyfill.84abecef.js    40.5 kB     12.4 kB
 => => #   dist/static/js/lib-react.0b11da2f.js       140.3 kB    45.0 kB
 => => #   dist/static/js/877.f4d2276a.js             325.1 kB    99.5 kB
 => => #   Total size:  556.0 kB
 => => #   Gzipped size:  174.2 kB

Forever.

Additional information

Works fine outside of Docker.

[m4r1vs]

See rspack issue for more details and another workaround.