It's been a while since last release of v2.0.0. This release comes with multiple bug fixes and improvements as well as new feature to bind specified mounts into job containers. That means /var/run/docker.sock is not binded by default anymore since that was a security issue.
Note that updating abstruse-server to v2.1.0 requires to update all workers to v2.1.0 as well since we refactored some of the code how commands are executed.