Update build script

latex/build-image.sh

@@ -14,6 +14,6 @@ docker push "$1"
 if [ -n "$OLD_IMG" ]; then
 	if [ "$OLD_IMG" != "$(docker image ls -q "$1")" ]; then
 		echo "New build uploaded, removing old image, id: $OLD_IMG"
-		docker image rm "$OLD_IMG" || true
+		docker image rmi -f "$OLD_IMG" || true
 	fi
 fi