How to setup mime type for index.html

I didn´t figure out how to set _AWS S3 Buket metadata system setup_ (e.g. `Content-Type: text/html`) for de index.html

Not doing that, S3 Bucket set all files as `application/octet-stream`.

I do know I can change that by using the _aws cli_ (and I am doing that already).

But, how do I set up mime types for some files during the step that uploads reports (mainly for **index.html**)?