adds Sign up form page

Author: charlottebrf

_layouts/sign_up_form.html

@@ -0,0 +1,16 @@
+{% include head.html %}
+
+<div class="container">
+    {% include header.html %}
+
+<h1>Hack Brexit Mailing List</h1>
+
+<p>Sign up on our Hack Brexit contact form for us to keep you updated with all of the latest news </p>
+
+  <iframe src="https://docs.google.com/forms/d/e/1FAIpQLSftbQrHueHZpjbXyXhWKvR-uixs2J_BFhxJL29ZVp-v9vFoiQ/viewform?embedded=true" width="760" height="500" frameborder="0" marginheight="0" marginwidth="0">Loading...</iframe>
+
+    {% endfor %}
+</div>
+{% include footer.html %}
+
+{% include foot.html %}