Update scripts so we give filename if we have one (#8)
Update scripts so we give filename if we have one (#8)

Test Plan:
- run the debug server against webapp with some bad SSR code that throws to see a stack; should include file URLs

Reviewers: #fe-infra

Subscribers: #fe-infra
Khan/react-render-server,Khan/react-render-server,Khan/react-render-server