Move content to docs folder and fix docker-compose(#367)

_includes/analytics.html

@@ -1,16 +0,0 @@
-<!-- Analytics -->
-<script>
-  (function (i, s, o, g, r, a, m) {
-    i['GoogleAnalyticsObject'] = r;
-    i[r] = i[r] || function () {
-      (i[r].q = i[r].q || []).push(arguments)
-    }, i[r].l = 1 * new Date();
-    a = s.createElement(o),
-      m = s.getElementsByTagName(o)[0];
-    a.async = 1;
-    a.src = g;
-    m.parentNode.insertBefore(a, m)
-  })(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga');
-  ga('create', '{{site.analytics}}', 'auto');
-  ga('send', 'pageview');
-</script>