add reset styles for html and body tags

web/app/components/document/document.scss

@@ -0,0 +1,6 @@
+html, body {
+  margin: 0;
+  padding: 0;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}

web/app/components/document/index.js

@@ -0,0 +1 @@
+require('./document.scss');

web/app/remark.js

@@ -6,6 +6,8 @@ import Root from './components/root';
 
 import { NODE_ID } from './common/constants';
 
+require('./components/document');
+
 init();
 
 function init() {

web/index.ejs

@@ -31,6 +31,7 @@
     (function() {
       var d = document, s = d.createElement('script');
       s.src = 'https://demo.remark42.com/web/embed.js';
+      s.type = 'text/javascript';
       (d.head || d.body).appendChild(s);
     })();
   </script>