message: bring the login button inline with the specs.
diff: +<style>
  + .btn-tertiary {
  + display: flex;
  + align-items: center;
  + justify-content: center;
  + height: 2rem;
  + width: 5.313rem;
  + }
  +</style>
  +
  <a href="https://gitpod.io/login/" class="btn-tertiary"> Login </a>
  