Hi,
The WebViewer class doesn’t have a property to set request headers - the available properties can be found here.
It is possible to run converter on Docker: Docker Support — HOOPS Communicator Documentation
Note, you will need an X server set up for running converter in a headless environment: Converter Application — HOOPS Communicator Documentation.
Here’s a more recent example of a Docker image: AMI and Docker Image released for HOOPS Communicator to make backend-deployment easier
Let me know if this doesn’t answer your question or if you have any additional questions!