Fix nginx index directive order for root directory

- Changed index order from 'index.html index.htm index.php' to 'index.html index.php index.htm'
- This fixes 403 forbidden errors when accessing root directory
- index.html should be checked first for root requests, then index.php
- Resolves directory listing forbidden errors in container logs

nginx.template.conf

@@ -12,7 +12,7 @@ events {
 
 http {
     include    $!{nginx}/conf/mime.types;
-    index    index.html index.htm index.php;
+        index    index.html index.php index.htm;
 
     default_type application/octet-stream;
     log_format   main '$remote_addr - $remote_user [$time_local]  $status '