fix(deploy): delete PHX_SERVER env before starting app in reset/seed

Application.put_env is overridden by runtime.exs during app startup
since it re-reads PHX_SERVER from the environment. Deleting the env
var ensures runtime.exs never enables the HTTP server.

Author: puemos

lib/craftplan/release.ex

@@ -41,7 +41,7 @@ defmodule Craftplan.Release do
   end
 
   defp start_app_without_server do
-    Application.put_env(:craftplan, CraftplanWeb.Endpoint, server: false)
+    System.delete_env("PHX_SERVER")
     {:ok, _} = Application.ensure_all_started(@app)
   end