The group project finally has one machine

Four students, one capstone, one container. Each opens their own editor instance: code-1 through code-4: on the same filesystem. Saves propagate; cursors don't. The app's database is a SQLite file under /hoody/databases/, where the host-level mount serializes writes, so the frontend student and the backend student don't corrupt each other's rows on the same afternoon.

The dev server on port 3000 is already a public URL with a certificate. The fourth teammate, who mostly does the slides, opens it on her phone to check the demo.

Before, the group had four laptops, four Node versions, a shared Google Doc of environment variables, and one person whose machine the demo ran on. Now there's a URL the instructor can open too.

The group project has one machine, so 'works on mine' stops being a sentence anyone says.