gunicorn3 scanmeapp:app --bind=0.0.0.0 --timeout=360 --log-level=debug
timeout is important for hi-res scans and stops gunicorn from restarting and leaving the scanner dangling, required on/off for me
gunicorn's port is 8000, werkzeug is 5000.
may need to add:
ATTRS{idVendor}=="04b8", ATTRS{idProduct}=="0865", MODE="0666"
as a new udev rule in /etc/udev/rules.d
use:
sane-find-scanner
to find the vendor code
may also need to change a file in:
/etc/sane/ ..
at the "usb" line.