alphacep vosk-browser

I am new to javascript. I want to see how the vosk-browser script worked using the sample script.
I downloaded a vosk model, zipped it as tar.gz and put it in the same folder as the script. I tried to just check for errors using a button onclick event on a html page. I got this on visual studio code:
Setting up persistent storage at /vosk null/4ccd8af6-9ac1-407c-9f6a-436d83146d69:147
File system synced from host to runtime null/4ccd8af6-9ac1-407c-9f6a-436d83146d69:40
Am I to create a folder named "vosk". I really do not understand.
Thank you for responding.