Add WebRTC HTTP server example

Change-Id: I005d1e363cad2fae4f403d82e5a34c3b2030d7bb
Add HTML file

Change-Id: I93a5f03a7acec3e1533c05e397a07baff14f397b
Serve HTML file for path "/"

Change-Id: Ie8e9f78c2f4a2d57c8b8f698bcf77acc2f5c9f34