Enforce HTTPS (via Let's Encrypt) and enable HTTP/2 on site

Author: Daniel15

site/nginx.conf

@@ -1,8 +1,18 @@
 server {
+	listen 80;
+	server_name reactjs.net localdev.reactjs.net;
+	return 301 https://$host$request_uri;
+}
+
+server {
+	listen 443 ssl http2;
 	server_name reactjs.net localdev.reactjs.net;
 	root /var/www/reactjs.net/site/public/;
 	index index.html index.php;
 
+	ssl_certificate /etc/letsencrypt/live/reactjs.net/fullchain.pem;
+	ssl_certificate_key /etc/letsencrypt/live/reactjs.net/privkey.pem;
+
 	# Shortcuts
 	rewrite ^/download$ /getting-started/download.html redirect;
 	rewrite ^/docs$ /getting-started/download.html redirect;