WS30: Bump docker image version to 3.0.0
Fix #29 by referencing the correct instancing effect
Shader Buildings: Fix flat roof normals
WS30: Bump docker image version to 2.2.2
WS30: Fix rule for Docker image building CI job
WS30: Fix CI variable for docker image build and release
WS30: Bump docker image version to 2.2.1
WS30: Explicitly set `osgdem` permissions