Add sandbox project using Contentful CMS

I used the boilerplate/typescript project as a starting point. This project
fetches and renders books that I'm defining in a Contentful CMS that I created.

website/sandbox/contentful/tailwind.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  theme: {
+    extend: {},
+  },
+  variants: {},
+  plugins: [],
+}