Update default/main.yml by adding vars for generating custom locations in web_server mode

defaults/main.yml

@@ -164,6 +164,9 @@ nginx_http_template:
       cert: ssl/default.crt
       key: ssl/default.key
     web_server:
+      locations:
+        default:
+          location: /
           html_file_location: /usr/share/nginx/html
           html_file_name: index.html
       http_demo_conf: false