Add modified dockerfile from previous version

.docker/Viewer-v2.x/entrypoint.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# If CLIENT_ID is specified, use the google.js configuration with the modified ID
+if [ ! -z "$CLIENT_ID" ]
+  then
+  	echo "Google Cloud Healthcare $CLIENT_ID has been provided: "
+  	echo $CLIENT_ID
+  	echo "Updating config..."
+
+  	# - Use SED to replace the CLIENT_ID that is currently in public/config/google.js
+	sed -i -e "s/YOURCLIENTID.apps.googleusercontent.com/$CLIENT_ID/g" /usr/share/nginx/html/config/google.js
+
+	# - Copy public/config/google.js to overwrite public/config/default.js
+	cp /usr/share/nginx/html/config/google.js /usr/share/nginx/html/config/default.js
+fi
+
+echo "Starting Nginx to serve the OHIF Viewer..."
+
+exec "$@"