Use demo/ app instead

Use app-file outside demo/ dir

Airways segmentation running locally on a resampled version of the test CT[skip ci]

Renamed inference script + reverted resources path in Dockerfile

Moved resources/ dir next to app.py

Use newer Python version in Dockerfile

Build on top of python:3.7-slim image in Dockerfile

Fixed reqs file path in Dockerfile

Fixed CMD path

Setup repo + demo