Reworking static page generation

Including styles in components wasn't working with the old system.

src/pages/404/template.js

@@ -1,13 +0,0 @@
-import 'babel-register';
-import React from 'react';
-
-import '../../i18n';
-
-import PageTemplate, { renderToString } from '../../components/PageTemplate';
-import Component from './Component';
-
-export default renderToString(
-  <PageTemplate>
-    <Component/>
-  </PageTemplate>
-);