Co-authored-by: Effy Elden <effy@effy.space>
* Improve devcontainer for running tests - Pull devcontainer post-create out into its own script - Add asset precompilation - Add test-mode asset precompilation (needed to run tests without error) * Document Gemfile.lock re-checkout in devcontainer
* Format JSON and YAML using Prettier * Add prettier to devDep
* Add DevContainer config * Add `--path vendor/bundle` to `postCreateCommand`