chore: initial commit

_includes/google-analytics.html

@@ -0,0 +1,11 @@
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}"></script>
+<script>
+  window.dataLayer = window.dataLayer || []
+  function gtag() {
+    dataLayer.push(arguments)
+  }
+  gtag('js', new Date())
+
+  gtag('config', '{{ site.google_analytics }}')
+</script>