Add the sftpgo server and a web server

jupyterhub_volumes/web/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Course Portal</title>
+</head>
+<body>
+    <h1>Welcome</h1>
+    <ul>
+        <li><a href="/jupyter/">JupyterHub</a></li>
+        <li><a href="/static/">Static Site</a></li>
+    </ul>
+</body>
+</html>