FIX: /rules route showed error page

app/assets/javascripts/discourse/routes/app-route-map.js.es6

@@ -179,6 +179,7 @@ export default function() {
   this.route("tos", { path: "/tos" });
   this.route("privacy", { path: "/privacy" });
   this.route("guidelines", { path: "/guidelines" });
+  this.route("rules", { path: "/rules" });
 
   this.route("new-topic", { path: "/new-topic" });
   this.route("new-message", { path: "/new-message" });

app/assets/javascripts/discourse/routes/rules.js.es6

@@ -0,0 +1,3 @@
+import staticRouteBuilder from "discourse/lib/static-route-builder";
+
+export default staticRouteBuilder("rules");

config/locales/client.en.yml

@@ -229,6 +229,7 @@ en:
     privacy_policy: "Privacy Policy"
     privacy: "Privacy"
     tos: "Terms of Service"
+    rules: "Rules"
     mobile_view: "Mobile View"
     desktop_view: "Desktop View"
     you: "You"