Fix Docker setup and add back back an entrypoint

* Also add special deps for argon2 support inside the Alpine image
* Make sure yarn install is triggered

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/views/layout_view.ex

@@ -1,5 +1,4 @@
 defmodule MobilizonWeb.LayoutView do
   use MobilizonWeb, :view
   alias Mobilizon.Service.Metadata
-
 end