Cannot start FCM adapter when build for Production #247

Environment

• Elixir & Erlang/OTP versions (elixir --version): 1.15.5
• Operating system: linux
• Pigeon version: 2.0.0-rc.1

Current behavior

I have problem when build my project in production, that here: Kernel pid terminated (application_controller) ({application_start_failure,k_gates,{{shutdown,{failed_to_start_child,'Elixir.KGates.FCM',{shutdown,{failed_to_start_child,1,{{case_clause,{stop,{{{badmatch,{error,{{badmatch,{error,{bad_return_value,{error,etimedout}}}},[{'Elixir.Kadabra.Connection',init,1,[{file,"lib/connection.ex"},{line,44}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,848}]},{gen_server,init_it,6,[{file,"gen_server.erl"},{line,811}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,240}]}]}}},[{'Elixir.Kadabra.ConnectionPool',init,1,[{file,"lib/connection_pool.ex"},{line,59}]},{gen_server,init_it,2,[{file,"gen_server.erl"},{line,848}]},{gen_server,init_it,6,[{file,"gen_server.erl"},{line,811}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,240}]}]},{child,undefined,#Ref<0.2086631506.426246145.164154>,{'Elixir.Kadabra.ConnectionPool',start_link,[#{'__struct__' => 'Elixir.URI',authority => <<"fcm.googleapis.com">>,fragment => nil,host => <<"fcm.googleapis.com">>...
When I run on my local machine, it all works well. Can you explain to me what problem I have when I build, that is my setup for FCM in config.exs:

config :k_gates, KGates.FCM,
  adapter: Pigeon.FCM,
  project_id: System.get_env("FCM_APP_NAME", ""),
  service_account_json: File.read!(Path.join(File.cwd!(), "/service-account.json"))

and I added it in application.ex, besides setup

defmodule KGates.FCM do
  use Pigeon.Dispatcher, otp_app: :k_gates
end

Expected behavior