Container build error due to missing config/webpack/tests

[BlankRH]

Steps to reproduce the problem

1. Build container in github codespace

Expected behaviour

Successful build

Actual behaviour

Got an error

Detailed description

Error message: webpack config /workspaces/mastodon/config/webpack/tests.js not found, please run 'bundle exec rails webpacker:install' to install Webpacker with default configs or add the missing config file for your custom environment.

The file was deleted in #27333

Mastodon instance

No response

Mastodon version

No response

Technical details

No response

[vmstan]

@renchap was that file intended to be deleted? I got the same error a couple days ago trying to get a container going.

[renchap]

Yes, this is intended.

I am not sure what is trying to use this file, it should not be used. Maybe the container needs to be re-created from scratch (once #27788 is merged)?

[vmstan]

I get the same error even with that patch.

[renchap]

I do not understand what command is launched that will try to load this file.

It must be a webpack (or webpacker?) invocation with NODE_ENV=tests, but I cant figure out what is calling it 🤔