message: feat: health check
  Health check available through `/healthz`
  closes
diff: @@ -36,3 +36,4 @@ export const router = Router()
  .get('/storage/file-meta/*', get_file_meta)
  .get('/storage/file/*', get_file)
  .post('/storage/upload', upload_file)
  + .get('/healthz', (_req, res) => res.send('OK'))
  