Update nginx config to server client online check

Author: turegjorup

.docker/templates/default.conf.template

@@ -16,6 +16,11 @@ server {
         try_files $uri /index.php$is_args$args;
     }
 
+    # Screen client online check should just serve static files
+    location /client/online-check {
+        index index.html index.htm;
+    }
+
     # Protect files and directories from prying eyes.
     location ~* \.(engine|inc|install|make|module|profile|po|sh|.*sql|.tar|.gz|.bz2|theme|twig|tpl(\.php)?|xtmpl|yml)(~|\.sw[op]|\.bak|\.orig|\.save)?$|^(\.(?!well-known).*|Entries.*|Repository|Root|Tag|Template|composer\.(json|lock)|web\.config)$|^#.*#$|\.php(~|\.sw[op]|\.bak|\.orig|\.save)$ {
         deny all;