Add ENABLE_IMAGE_VIX env

lib/mix/mess.exs

@@ -77,6 +77,7 @@ if not Code.ensure_loaded?(Mess) do
     defp deps_uniq(packages, opts),
       do:
         packages
+        |> Enum.reject(&is_nil/1)
         # |> IO.inspect(label: "non-unique")
         |> maybe_filter_invalid_paths(opts)
         |> Enum.uniq_by(&elem(&1, 0))

mix.exs

@@ -32,8 +32,14 @@ defmodule Bonfire.Umbrella.MixProject do
                     else: []
                   )
 
+  @maybe_image_vix if(System.get_env("ENABLE_IMAGE_VIX") != "0",
+                     do: [{:image, "~> 0.37", runtime: true, override: true}],
+                     else: []
+                   )
+
   @extra_deps @main_deps ++
                 @maybe_api_deps ++
+                @maybe_image_vix ++
                 [
                   {:ex_aws, git: "https://github.com/bonfire-networks/ex_aws", override: true},
                   # compilation