My google cloud storage browser is seeing the incorrect content-type on all of my static files (css, js, jpg, etc.) and this is causing a mime type error when serving these files which causes my website to not apply my css styles. Why is this happening and how can I fix this? I am linking my static files correctly and with specifying the correct content-type, but this error is still happening.
<link rel="stylesheet" type="text/css" media="screen,print" href="index_files/index.css" />
<script type="text/javascript" src="index_files/index.js"></script>
As you can see in the following images, google cloud storage is seeing these static files with content-type application/octet-stream when it should be seeing them as text/css and text/javascript.
UPDATE
The files are uploaded manually to the bucket.

