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/static/BUILD.bazel b/hswaw/site/static/BUILD.bazel
index 141161c..d70c620 100644
--- a/hswaw/site/static/BUILD.bazel
+++ b/hswaw/site/static/BUILD.bazel
@@ -4,9 +4,12 @@
 go_embed_data(
     name = "static",
     srcs = [
-        "kontakt.png",
-        "main.css",
-        "mapka.png",
+        "leaflet.css",
+        "leaflet.js",
+        "landing.css",
+        "syrenka.png",
+        "images/marker-icon.png",
+        "images/marker-shadow.png",
     ],
     package = "static",
 )