Add 404 page

- User will be redirected to 404 page when navigating to
  undefined routes

Signed-off-by: Dixsie Wolmers <dixsie@ibm.com>
Change-Id: I5d7bbcfdd279b6f6c993370e3adb39a516dbb1ba
diff --git a/src/locales/en-US.json b/src/locales/en-US.json
index c38b6a1..07eae3d 100644
--- a/src/locales/en-US.json
+++ b/src/locales/en-US.json
@@ -114,6 +114,7 @@
     "managePowerUsage": "Manage power usage",
     "networkSettings": "Network settings",
     "overview": "Overview",
+    "pageNotFound": "Page not found",
     "profileSettings": "Profile settings",
     "rebootBmc": "Reboot BMC",
     "sensors": "Sensors",
@@ -498,6 +499,9 @@
       "successSaveNetworkSettings": "Successfully saved network settings."
     }
   },
+  "pagePageNotFound": {
+    "description": "The requested resource could not be found."
+  },
   "pageRebootBmc": {
     "lastReboot": "Last BMC reboot",
     "rebootBmc": "Reboot BMC",