hswaw/site: add landing page prototype

This rips out the existing HTML and CSS. In the end, we're not going to
use it.

In its place, it adds a simplistic landing page, hoping to gather more
attention and curiosity from other hackers that would like to make it
prettier.

Change-Id: I322b071a8510536bd6aad9252ae7aa8fe3a734bc
diff --git a/hswaw/site/templates/BUILD.bazel b/hswaw/site/templates/BUILD.bazel
index cc47353..07f5112 100644
--- a/hswaw/site/templates/BUILD.bazel
+++ b/hswaw/site/templates/BUILD.bazel
@@ -4,12 +4,7 @@
 go_embed_data(
     name = "templates",
     srcs = [
-        "about.html",
-        "about_en.html",
-        "basic.html",
-        "main.html",
-        "subscribe.html",
-        "subscribe_en.html",
+        "index.html",
     ],
     package = "templates",
 )