try to alleviate istio issues

image/nginx.conf

@@ -37,7 +37,7 @@ http {
         error_page  404    /404.html;
 
         location / {
-            try_files $uri $uri/ $uri/index.html =404;
+            try_files $uri $uri/ $uri/index.html $request_uri $request_uri/ $request_uri/index.html =404;
         }
 
     }