title: Whatsapp redirect link like wa.me but with custom domain
body: <p>Does anyone know the suitable or recommended way to make whatsapp redirect link like wa.me/PhoneNumber ..
  is it using javascript redirect to the link?
  or just use URL redirect using custom domain and then redirect to wa.me/phoneNumber</p>
  
  <p>the use case is when user click the link (custom domain), it will open whatsapp and having conversation with us..</p>