HTTPS, HTTP2 & SPDY on NginX

default.conf

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

        listen 443 ssl http2 default_server;
        listen [::]:443 ssl http2 default_server;
        ssl     on;
        ssl_certificate your-bundle.cert;
        ssl_certificate_key your-key.key;
        
        location / {
              proxy_pass http://localhost:8000;
              proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
              proxy_set_header Host $host;
              proxy_redirect off;
              proxy_set_header Upgrade $http_upgrade;
              proxy_set_header Connection "Upgrade";
              proxy_set_header X-Forwarded-Proto https;
        }
}