directory cleanup on startup

packages/api/src/utility/cleanDirectory.js

@@ -0,0 +1,11 @@
+const findRemoveSync = require('find-remove');
+
+function cleanDirectory(directory) {
+  findRemoveSync(directory, {
+    age: { seconds: 3600 },
+    files: '*.*',
+    dir: '*',
+  });
+}
+
+module.exports = cleanDirectory;