get started on route for creating links, dividing steps into components

lib/entendu/links/link.ex

@@ -0,0 +1,18 @@
+defmodule Entendu.Links.Link do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "links" do
+    field :burn_after_reading, :boolean, default: false
+    field :expires, :utc_datetime
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(link, attrs) do
+    link
+    |> cast(attrs, [:expires, :burn_after_reading])
+    |> validate_required([:expires, :burn_after_reading])
+  end
+end