Improves logging for MQTT server events to provide more detailed
information for debugging and monitoring. Logs the message payload
when a client publishes a message and includes username, password,
and remote IP address when an observer fails to connect due to
invalid credentials.
Adds initial files for a proof-of-concept project, including Dockerfile, .gitignore, project files, and MQTT-related services.
This commit sets up the basic structure and configuration for exploring and validating the core concepts of the project.
