Docker Documentation suggests Azure Function V2 programming model is required

[tchapin]

The docker documentation
https://github.com/Esri/arcgis-python-api/blob/master/docker/README.md
says "Your copied resources will need to include:
function_app.py, such as:"
followed by a code snippet in the V2 programming model.

Is the v2 programming model required to use the Esri docker container?
Or can we continue to use the V1 programming model?

[nanaeaubry]

@jtroe Can you please advise?

[jtroe]

@tchapin the approach documented was required due to a system-level dependency for Kerberos authentication. We have since made the dependency optional (on the pip build) through an extra, so the pip install arcgis command now succeeds in the standard (v4) runtime.

I've updated the sample to reflect this in #2375, currently in review.