Add docker/supernova.sh - when nukes just won't do

docker/supernova.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+#
+# supernova.sh: when a nuke just isn't big enough.
+#
+# Builds upon nuke.sh to remove everything od-related, including the static
+# oregondigital/* images in case of a local image build going wrong.
+./docker/nuke.sh
+csi=$(echo -e "\x1b[")
+warn="${csi}31;1m"
+info="${csi}34m"
+reset="${csi}0m"
+echo
+echo -ne $warn
+echo "Removing all images related to OregonDigital development"
+echo -ne $reset
+docker rmi $(docker images | grep "oregondigital" | awk '{print $3}')
+echo
+echo -ne $info
+echo "Re-pulling / re-building will automatically happen next time you run"
+echo "\`docker-compose up\`"
+echo -ne $reset