adds phoenix boilerplate and database api

- message communication added
- database migration added
- initial commit

lib/bump_web/controllers/page_controller.ex

@@ -0,0 +1,7 @@
+defmodule BumpWeb.PageController do
+  use BumpWeb, :controller
+
+  def index(conn, _params) do
+    render(conn, "index.html")
+  end
+end