Merge branch 'shib-configs-update' into 'staging'

config/emg_preprocessor-config.yml

config/shibboleth/shib-apache.conf

config/shibboleth/shibboleth2_template.xml

config/shibboleth/vhr18-shibboleth2.xml

docker-compose.base.ops.yml

docker-compose.dem.staging.yml

docker-compose.emg.ops.yml

docker-compose.emg.staging.yml

docker-compose.vhr18.staging.yml

documentation/operator-guide/access.rst

ingestor/ingestor/util.py

preprocessor/Dockerfile

preprocessor/preprocessor/config-schema.yaml

preprocessor/preprocessor/steps/georeference.py

preprocessor/preprocessor/steps/output.py

preprocessor/preprocessor/steps/stack.py

preprocessor/preprocessor/steps/subdataset.py

preprocessor/preprocessor/util.py

shibauth/Dockerfile

shibauth/configure.sh