update example nginx to 1.17 (#16046)

inductor · k8s-ci-robot · commit bd5f789314d8 · 2019-08-27T00:18:41.000-07:00
diff --git a/content/ja/examples/service/access/Dockerfile b/content/ja/examples/service/access/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:1.9.14
+FROM nginx:1.17.3
 
 RUN rm /etc/nginx/conf.d/default.conf
 COPY frontend.conf /etc/nginx/conf.d
