header.html

<script>
  var interval = setInterval(function(){
      var el = document.querySelector('.search-noresults');
      var content = '<a href="https://paypal.me/basaratali" style="display: block;text-align: center;"> Buy me a beer / coffee 🍻 ☕️ 🌹 <br><br><img src="https://img.shields.io/badge/Donate-PayPal-green.svg" alt="donate"><br><br></a>';
      if(el) {
        if (el.innerHTML.indexOf(content) === -1){
          var elChild = document.createElement('div');
          elChild.innerHTML = content;
          el.insertBefore(elChild, el.firstChild);
        }
        clearInterval(interval);
      }
  },1000);
</script>