Update nginx

devices/common/files/etc/config/nginx

@@ -6,7 +6,7 @@ config server '_lan'
 	list listen '80 default_server'
 	list listen '[::]:80 default_server'
 	option server_name 'op'
-	option index 'ng_index.html index.html'
+	option index 'ng_index.html index.html index.htm'
 	list include 'conf.d/*.locations'
 	option access_log 'off; # logd openwrt'
 	
@@ -14,7 +14,7 @@ config server '_ssl'
 	list listen '443 ssl'
 	list listen '[::]:443 ssl'
 	option server_name '_ssl'
-	option index 'ng_index.html index.html'
+	option index 'ng_index.html index.html index.htm'
 	list include 'conf.d/*.locations'
 	option ssl_certificate '/etc/nginx/conf.d/_lan.crt'
 	option ssl_certificate_key '/etc/nginx/conf.d/_lan.key'