I don't think these changes should be included in this PR as you already have another PR #1422 that adds thin and quiet_assets to Gemfile. GitHub doesn't support diffbase view, so there is no way to open a PR that is dependent on another PR without showing duplicated diffs. So unless we make sure #1422 gets merged first, the commit `add quiet-assets and switch to thin web server for dev` should probably be removed from the branch `pdf_stalling_fix`. Meanwhile you will still be able to use thin and quiet_assets by simply having them installed.

```
git checkout pdf_stalling_fix
git rebase -i 96117d028cc8d427c8ab16461bd3336803b8f54c
```
This starts an interactive rebase starting with the commit immediately before the commit we want to remove. We can remove the commit by deleting the line `pick 6f77ae2 add quiet-assets and switch to thin web server for dev` in the opened editor.