Migrate once when loaded

app/setup/api/settings.php

@@ -22,5 +22,11 @@ return [
       'routes'
     ]);
     return (object) $arr;
-  })
+  }),
+  'phinx' => function(Container $c) {
+    return implode(DIRECTORY_SEPARATOR, [
+      $c->get('locations')->base,
+      'phinx.php'
+    ]);
+  }
 ];