Okay, the implementation (app.py and utils.py) looks good, but I have some request for changes in code organization

1. update req.txt and Contrainerfile for python and system dependencies
   • e.g., apt install tesseract
   • you might also find basing on a base image that has opencv pre-installed will be useful to extract images using vdh implementation (look for opencv suffix inhttps://github.com/orgs/clamsproject/packages?tab=packages&q=clams-python)
2. get rid of files and comments that are supposed to be internal msg to devs. (but keep old license)
3. refactor test codes into a subdirectory (e.g., tests)

Would you do an "amend" commit and force-push with reorganization?