Fix the Host header limitation

[candidia]

It seems like serverless-lift has a solution to forward the Host header https://github.com/getlift/lift/blob/master/src/constructs/aws/ServerSideWebsite.ts#L448

Perhaps using that plugin directly in your template could help or drawing from their source.

[shamsup]

This is a good solution to the double-deploy problem. I'll consider it when I eventually update this template for later remix versions.