Ok it seems this UTF-8 Content-Type header comes from the PHP configuration itself (which in my case I don’t want to touch) http://php.net/manual/en/ini.core.php#ini.default-charset.
It doesn’t seem that I can overwrite it with caddy? 
Ok it seems this UTF-8 Content-Type header comes from the PHP configuration itself (which in my case I don’t want to touch) http://php.net/manual/en/ini.core.php#ini.default-charset.
It doesn’t seem that I can overwrite it with caddy?