Return proper code when a starr instance is down

Handle an instance down in the UI instance management list

Author: austinwbest

root/app/www/public/api/index.php

@@ -237,6 +237,10 @@
             echo $request['response'];
             exit();
         } else { //-- RETURN THE JSON API RESPONSE
+            if (!$request['code']) {
+                apiResponse(502, ['error' => sprintf(APP_API_ERROR, 'could not access the requested starr app, it appears to be down and returning an HTTP 0 code')]);
+            }
+
             apiResponse($request['code'], $request['response'], $request['responseHeaders']);
         }
     }

root/app/www/public/pages/starr.php

@@ -47,11 +47,16 @@
                             $starrInstance['name'] = $test['response']['instanceName'];
                         }
 
+                        $instanceDown = !$version ? true : false;
                         ?>
                         <tr>
                             <td>
-                                <?= $starrInstance['name'] ?><br>
-                                <span class="text-small"><?= $branch ?> → v<?= $version ?></span>
+                                <?php if ($instanceDown) { ?>
+                                    <div class="text-center text-danger">Unreachable</div>
+                                <?php } else { ?>
+                                    <?= $starrInstance['name'] ?><br>
+                                    <span class="text-small"><?= $branch ?> → v<?= $version ?></span>
+                                <?php } ?>
                             </td>
                             <td><input type="text" class="form-control" id="instance-url-<?= $starrInstance['id'] ?>" placeholder="http://localhost:1111" value="<?= $starrInstance['url'] ?>"></td>
                             <td>