ADD new page with practices via iframe

donal

2018-07-03 2533e01df4306abbd8b24a08a55c2ed8c788d210

 exercises/index.html

@@ -26,11 +26,19 @@
  </script>
  <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
  <script src="//unpkg.com/docsify/lib/plugins/search.min.js"></script>
  <script src="//unpkg.com/docsify-pagination/dist/docsify-pagination.min.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-bash.min.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-javascript.min.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-groovy.min.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-yaml.min.js"></script>
  <script src="//unpkg.com/prismjs/components/prism-json.min.js"></script>
  <script>
    // this didn't work cuz of CORS :(
    function resizeIframeHack(iframe) {
      // console.log(window.document.body.scrollHeight)
      iframe.height = iframe.contentWindow.document.body.scrollHeight + "px";
    }
  </script>
</body>

</html>