How to start VisionAI API?

[kbegiedza]

After installation API is not running.

executing visionai init prompts about Env file.

Where I can find any docs about configuration and running demo with external camera? Almost every command fails with error:

VisionAI API Failed to establish a connection to the server. Please check if the server is running and reachable.

I managed to execute some demos with webcam, but unable to connect to my rtsp cam or video from file.