Mirrors the Model devcontainer's Playwright setup for this Next.js repo, so
agents and humans can drive the running app in a browser.
The image bakes in chromium's apt libraries (as root) and the browser binary
(as vscode, so it lands in that user's cache), meaning a fresh container is
ready to run with no first-use download. The @playwright/test version and the
Dockerfile's PLAYWRIGHT_VERSION are pinned to the same number because Playwright
ties browser builds to a library version.
Also ports Model's headed viewer stack (Xvfb -> fluxbox -> x11vnc -> noVNC on
:6080) as scripts/start_viewer.sh, for watching a headed run.
Cypress is untouched; Playwright specs live in e2e/.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
