Async docker launch

Wrapped the docker launch in an async function. This should fix problems with the API hanging on docker startup, but also implies that the API does properly handle and report exceptions happening during the docker launch.

added 4 commits

• 5ab095f4...567463be - 2 commits from branch develop
• 66b7e51d - Wrapped docker run with an async function.
• 5423e31e - Added proper execution of the async container startup function.

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approved this merge request

mentioned in commit 96cfc491

merged