Build Containers In Background #1154
Description
The task manager will often build a container in the foreground, meaning it can't update any task states for other workflows while it's waiting on the container build to happen. There needs to be a way to multiprocess this or avoid sequential logic, It should be possible to start the build in the background and not submit that task until its container is ready, while still doing task state updates for the other workflows / tasks in BEE.