Cleanup

build.sh

@@ -5,7 +5,7 @@
 #
 # Be careful, it may not be using the latest QMK.
 
-docker run -it \
+docker run -it --rm \
 	--user $(id -u):$(id -g) \
 	-v "$(pwd)/output:/build_output" \
 	-v "$(pwd)/keyboards:/qmk_firmware/keyboards:ro" \