remove w perms after build in build script

Author: trevorcampbell

build_html.sh

@@ -1,3 +1,3 @@
-chmod a+w source/
-chmod a+w source/data/
+chmod -R o+w source/
 docker run --rm -v $(pwd):/home/jovyan ubcdsci/py-intro-to-ds:202212191809333bdc71 /bin/bash -c "jupyter-book build source"
+chmod -R o-w source/