meshcore-mqtt-broker

Dockerfile and CI

Add GitHub FUNDING.yml

Enhance subscriber configuration to include maxConnections per user. Update .env.example to reflect new format and default values. Implement loadSubscriberConfig function to validate and load maxConnections. Modify server logic to enforce connection limits and improve logging for subscriber authentication and disconnections.

Add authorization for admin subscribers to publish and subscribe to serial/commands topics, with validation for topic format and JWT payloads. Implement checks for publisher clients to subscribe only to their own serial/commands topics. Enhance logging for authorization events.