Project Overview I built TestFlow Agent — an open-source tool that turns plain-English test cases (or a live browser recording) into runnable Postman, Playwright, and JMeter tests. Its live-discovery feature launches a headed Chromium via Playwright to record real traffic. That only works where there's a display, so when someone runs the backend inside Docker (no X server), the launch fails. To make that failure friendly, I added a guard that catches the error and returns a clear 503...