Merge branch 'fix-releases' into 'develop'

Fix releases by not relying on Mix

See merge request pleroma/pleroma!4344

changelog.d/releases.fix

@@ -0,0 +1 @@
+Fix release builds

lib/pleroma/application.ex

@@ -56,7 +56,7 @@ defmodule Pleroma.Application do
       Pleroma.Web.Plugs.HTTPSecurityPlug.warn_if_disabled()
     end
 
-    if Mix.env() != :test do
+    if Config.get(:env) != :test do
       Pleroma.ApplicationRequirements.verify!()
     end