Dear Sebastien,
thank you very much for helping me with this. I have copied all codes for building docker image to repo (GitHub - EvgeniyaMalikova/dockerVTKWEB: docker image template for vtk-based web vis), so they can be reproduced.
The output log with the application seems to be fine, it prints out "Starting factory" and “wslink:Starting factory” . But after monitoring the update of logs, it seems that all application-related log messages are printed out only after timeout expiration set in launcher.json (that is 25 or 45 and etc.) . So looks like something is blocking the application process from execution, and increasing timeout time makes no change (that is just my guess). I will try to record a video to provide the details on what I see in logs, to give at least some idea about the problem.
Thank you so much,
Best regards,
Evgeniya