I'm using this Dockerfile to build .Net Gateway with my PEX BS. It works fine. If I change the image reference here to store/intersystems/iris-community:2021.2.0.617.0
in line 8 (so update from 2020.2 to 2021.2) it fails to build with:
NET Framework (pronounced dot net) is a software framework developed by Microsoft that runs primarily on Microsoft Windows.