- Create Dockerfile.playwright with headed mode by default
- Create docker-compose.yml with MCP server, headed, and test profiles
- Update Playwright skill to recommend headed mode for observation
- Remove --headless flag so browser window is visible
- Add BROWSER_VISIBILITY.md guide for X11/Docker setup
- Add README.Docker.md with quick start instructions
Configuration:
- PLAYWRIGHT_MCP_HEADLESS=false (browser visible)
- Requires X11 display for Docker (DISPLAY=:0)
- Three profiles: default, debug, test
Refs: #12 in Milestone #44
