It's a no-API "static" website? I can recommend AWS:

• Put the website files in an S3 bucket.
• Set up a CloudFront distribution on front of it (cheaper and faster than to serve from S3 directly).

Easy to do, AWS has instructions in their own documentation: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/getting-started-cloudfront-overview.html

The only real cost you incur will be CloudFront itself. You can estimate it yourself based on anticipated traffic: https://aws.amazon.com/cloudfront/pricing/