Merge branch 'redirect-404' into 'develop'

redirect to stable 404

See merge request R3/howto-cards!42

.ci/.autoRedirect

@@ -41,7 +41,7 @@
                             if (status == 200) { // if sub-card is internal in the external directory and exists
                                 window.location.href = internalURL+'/stable/external/'+sub;
                             } else {
-                                window.location.href = internalURL+'/404.html';
+                                window.location.href = internalURL+'/stable/404.html';
                             }
                         });
                     }
@@ -51,7 +51,7 @@
                     if (status == 200) { // if card is internal and exists
                         window.location.href = internalURL+'/stable';
                     } else {
-                        window.location.href = internalURL+'/404.html';
+                        window.location.href = internalURL+'/stable/404.html';
                     }
                 });
             }
@@ -62,7 +62,7 @@
                 if (status == 200) { // if sub-car is internal and exists
                     window.location.href = externalURL+'/stable/'+sub;
                 } else {
-                    window.location.href = externalURL+'/404.html';
+                    window.location.href = externalURL+'/stable/404.html';
                 }
             });
         }