When following the instructions from: https://developers.arcgis.com/python/guide/install-and-set-up/#Installation-as-a-Docker-image The ArcGIS API for Python Docker image is missing: https://hub.docker.com/r/esridocker/arcgis-api-python-notebook/
Does anyone know what happened to it?
Unfortunately it got forgotten about and was very out of date. I have been using the official anaconda docker image instead.
Anaconda 3 Docker
