fix expired IRIS license

Author: rcemper

Diff for: Dockerfile

@@ -3,6 +3,7 @@ ARG IMAGE=store/intersystems/iris-community:2019.3.0.309.0
 ARG IMAGE=store/intersystems/iris-community:2019.4.0.379.0
 ARG IMAGE=store/intersystems/iris-community:2020.1.0.199.0
 ARG IMAGE=intersystemsdc/iris-community:2019.4.0.383.0-zpm
+ARG IMAGE=intersystemsdc/iris-community:latest
 FROM $IMAGE
 # bringing the standard shell back
 SHELL ["/bin/bash", "-c"]