Release v5.2 - Fixes to ensure correct starting after clone

[jmahmud]

3 Issues were experienced when originally cloned (running on macOS):

In the combined-worker-compose.yaml file:

• the ENABLE_LOG4J2_DEBUG environment variable was not being correctly processed as a boolean.
• the FlowManagementUI was not able to bind to port 5000
• the corda app was not able to mount the logs directory as it did not exist.

Therefore these have all been addressed in order to enure that the application starts up on initial clone.

This is to address issues raised in #90