Diverged docker-compose.yml

[traumschule]

The docker-compose.yml files in the joystream and orion repos are structurally different and should be synced.

• https://github.com/Joystream/joystream/tree/master/docker-compose.yml
• https://github.com/Joystream/orion/tree/master/docker-compose.yml

The orion version requires docker for joystream_default network to be present and ignores WS_SOURCE pointing to an external node:

Error response from daemon: network joystream_default not found