Nginx + LetsEncrypt Configuration With Proxying to Github Pages

nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    server {
        listen 80;
        server_name aduffy.org;
        return 301 https://aduffy.org$request_uri;
    }

    server {
        listen 	 443 ssl;
        server_name  aduffy.org;

        ssl_certificate         /etc/letsencrypt/live/aduffy.org/fullchain.pem;
        ssl_certificate_key     /etc/letsencrypt/live/aduffy.org/privkey.pem;
        ssl_session_timeout     1d;
        ssl_session_cache       shared:SSL:10m;
        ssl_session_tickets     off;

        ssl_protocols TLSv1.1 TLSv1.2;
        ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK';
        ssl_prefer_server_ciphers on;

        ssl_stapling 		on;
        ssl_stapling_verify 	on;

        ssl_trusted_certificate	/etc/letsencrypt/live/aduffy.org/chain.pem;
        resolver 8.8.8.8 8.8.4.4 valid=86400;
        resolver_timeout 10;

        add_header Strict-Transport-Security max-age=15768000;

        location / {
            proxy_pass              http://andreweduffy.github.com;
            proxy_redirect          default;
            proxy_buffering         off;
            proxy_set_header        Host                    $host;
            proxy_set_header        X-Real-IP               $remote_addr;
            proxy_set_header        X-Forwarded-For         $proxy_add_x_forwarded_for;
            proxy_set_header        X-Forwarded-Protocol    $scheme;
        }
    }
}