Http Asset Cache customization

[Gekctek]

Due to using the ic-assets package, the caching rules have been removed, but it might make sense to put them back

cache = {
            default = #public_({
                immutable = false;
                maxAge = 3600;
            });
            rules = [
                {
                    pattern = "/index.html";
                    cache = #public_({
                        immutable = true;
                        maxAge = 3600;
                    });
                },
            ];
        };