let serve_html = async (env, pathname) => {
// read HTML file
let data
try {
data = await env.site.min_html_cache.get(pathname)
}
catch (err) {
if (!(err instanceof Error) || err.code !== 'ENOENT')
throw err
return false
}
// try to extract head before/after stylesheet and body
match = data.toString().match(/^([^]*)