redirect all http requests and www.* requests to https://host.name/ (from @jaw-sh)

nginx.conf

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        server_name _;

        return 301 https://$host$request_uri;
}

server {
        listen 443;
        listen [::]:443;

        server_name "~^www\.(.*)$" ;
        return 301 https://$1$request_uri;
}