Publish feature branches from the master CI

containers/jug/feature.Dockerfile

+#syntax=docker/dockerfile:1.2
+ARG INTERNAL_TAG="testing" 
+
+## Make a specific "feature" image, identical to jug_xl except for the detector
+## symlinked as default in /opt/detector. Not that these images will be removed
+## in the future once we move the detectors already installed in the main
+## image.
+
+FROM eicweb.phy.anl.gov:4567/containers/eic_container/jug_xl:${INTERNAL_TAG}
+
+## also install detector/ip geometries into opt
+ARG DETECTOR=athena
+ARG DETECTOR_BRANCH=canyonlands
+RUN rm -rf /opt/detector/{setup.sh,lib,share}                                    \
+ && ln -sf /opt/detector/${DETECTOR}-${DETECTOR_BRANCH}/setup.sh                 \
+           /opt/detector/setup.sh                                                \
+ && ln -sf /opt/detector/${DETECTOR}-${DETECTOR_BRANCH}/lib                      \
+           /opt/detector/lib                                                     \
+ && ln -sf /opt/detector/${DETECTOR}-${DETECTOR_BRANCH}/share                    \
+           /opt/detector/share