Update directory structure in WebHostLib

WebHostLib/static/assets/tutorial.js

@@ -0,0 +1,17 @@
+window.addEventListener('load', () => {
+    new Promise((resolve, reject) => {
+        let ajax = new XMLHttpRequest();
+        ajax.onreadystatechange = () => {
+            if (ajax.readyState !== 4) { return; }
+            if (ajax.status !== 200) { reject('Unable to retrieve tutorial markdown file.') }
+            resolve(ajax.responseText);
+        };
+        ajax.open('GET', 'static/tutorial.md', true);
+        ajax.send();
+    }).then((response) => {
+        let markdown = new showdown.Converter();
+        document.getElementById('tutorial-wrapper').innerHTML = markdown.makeHtml(response);
+    }).catch((error) => {
+        console.log(error);
+    });
+});