Thank you @jkandasa . I am now able to get the webserver running and access the mycontroller.org web page.

Can you provide some guidance on how to set up the serial gateway? I have checked the support document and it doesn't answer the following questions:
How do I choose which one of the four drivers?
What are the criteria around setting the port name? I know the USB device has set up as COM 5. I am not sure what the example "/dev/ttyUSB0" indicates.
Baud rate and frequency should be OK at the suggested default values, I think

Thanks!