web: improve nginx configuration

* Enable http2 by default
* Disable server_tokens by default

web/rootfs/defaults/default

@@ -10,7 +10,7 @@ server {
 
 {{ if not (.Env.DISABLE_HTTPS | default "0" | toBool) }}
 server {
-	listen 443 ssl;
+	listen 443 ssl http2;
 
 	include /config/nginx/ssl.conf;
 	include /config/nginx/meet.conf;

web/rootfs/defaults/nginx.conf

@@ -19,7 +19,7 @@ http {
 	tcp_nodelay on;
 	keepalive_timeout 65;
 	types_hash_max_size 2048;
-	# server_tokens off;
+	server_tokens off;
 
 	# server_names_hash_bucket_size 64;
 	# server_name_in_redirect off;