Following up to my previous comment, it turns out I still need some help. My app is supposed to command a Digispark connected to a USB port of the Pi and for this I need to have libusb-dev installed in the Docker image. I added a preinstall script to the package.json and it seems to work. However, it can't find libusb-dev, apt-cache only finds libusb-0.1-4. This installs fine but the compilation of the npm packages still fails I think because it really needs a -dev version of the library.
Any idea how I can get past this?
Again, I am grateful for all the help I can get. Thanks in advance!