Motivation:
Docker shell was incorrectly using the swift-nio docker image
rather than the swift-nio-transport-services one.
Modifications:
Change docker compose file to use the correct image.
Result:
Correct image will be used for docker shell.
Motivation:
It's important that transport-services compiles and does nothing
on linux so it can be used in builds which just do the right thing
on all platforms.
Modifications:
Add basic docker-compose files based on those from swift-nio
Result:
It's possible to run docker on this repo to run the tests.