nginx: Add config to forward /learn to overleaf.com

server-ce/nginx/overleaf.conf

@@ -21,6 +21,10 @@ server {
 		proxy_send_timeout 10m;
 	}
 
+	location /learn {
+		proxy_pass https://overleaf.com;
+	}
+
 	location /socket.io {
 		proxy_pass http://127.0.0.1:3026;
 		proxy_http_version 1.1;