Add WebRTC Container

[alicup29]

Purpose:

• Make an image with SLEAP and all dependencies able to connect to via WebRTC for real-time streaming of data
• Web sockets will be used to facilitate the communication

Developer Workflow (1/16):

• Test worker, client, and signaling server maintaining connection
• Change directory organization to reflect worker container and external (client & server test files)

[eberrigan]

Let's have the organization be

|--sleap_webRTC
|--worker_container
|--client
|--server
|--tests/webRTC