Fix 404s for images on local dev server (#3204)
Fix 404s for images on local dev server (#3204)


flodolo/testpilot,lmorchard/idea-town-server,lmorchard/idea-town-server,lmorchard/testpilot,flodolo/testpilot,lmorchard/idea-town,meandavejustice/testpilot,fzzzy/testpilot,lmorchard/idea-town-server,mozilla/idea-town,lmorchard/testpilot,chuckharmston/testpilot,fzzzy/testpilot,flodolo/testpilot,lmorchard/idea-town,mozilla/idea-town-server,fzzzy/testpilot,flodolo/testpilot,chuckharmston/testpilot,fzzzy/testpilot,meandavejustice/testpilot,lmorchard/idea-town,lmorchard/idea-town,meandavejustice/testpilot,mozilla/idea-town-server,lmorchard/testpilot,lmorchard/testpilot,mozilla/idea-town,mozilla/idea-town-server,chuckharmston/testpilot,mozilla/idea-town,mozilla/idea-town-server,chuckharmston/testpilot,mozilla/idea-town,lmorchard/idea-town-server,meandavejustice/testpilot