Refer to home url in error view

apps/mebe_web/web/templates/error/not_found.html.eex

@@ -6,6 +6,6 @@
   </p>
 
   <p>
-    <a href="<%= page_path @conn, :index, 1 %>">Go away</a>.
+    <a href="<%= home_url %>">Go away</a>.
   </p>
 </div>

apps/mebe_web/web/views/error_view.ex

@@ -1,5 +1,7 @@
 defmodule MebeWeb.ErrorView do
   use MebeWeb.Web, :view
+  
+  @absolute_url Application.get_env(:blog_config, :absolute_url)
 
   def render("404.html", %{conn: conn}) do
     render "not_found.html", %{conn: conn}
@@ -14,4 +16,9 @@ defmodule MebeWeb.ErrorView do
   def template_not_found(_template, assigns) do
     render "500.html", assigns
   end
+
+  @doc """
+  Get the home page URL of the site.
+  """
+  def home_url(), do: @absolute_url
 end