feat(pastes): add page to view pastes

Signed-off-by: SphericalKat <amolele@gmail.com>

lib/ketbin_web/controllers/page_controller.ex

@@ -1,7 +1,15 @@
 defmodule KetbinWeb.PageController do
   use KetbinWeb, :controller
 
+  alias Ketbin.Pastes
+  alias Ketbin.Pastes.Paste
+
   def index(conn, _params) do
     render(conn, "index.html")
   end
+
+  def show(conn, %{"id" => id}) do
+    paste = Pastes.get_paste!(id)
+    render(conn, "show.html", paste: paste)
+  end
 end