aws s3 sync . s3://s464863-bucket --content-type "text/html" --exclude "" --include ".html"

-> text/html

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "PublicReadGetObject",
            "Effect": "Allow",
            "Principal": "*",
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::s464863-bucket/*"
        }
    ]
}