chore: add application module

lib/application.ex

@@ -0,0 +1,9 @@
+defmodule Exproj.Application do
+  use Application
+
+  @spec start(any(), any()) :: {:error, any()} | {:ok, pid()}
+  def start(_type, _args) do
+    children = []
+    Supervisor.start_link(children, strategy: :one_for_one)
+  end
+end

mix.exs

@@ -8,7 +8,7 @@ defmodule Exproj.MixProject do
       elixir: "~> 1.18",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
-      aliases: aliases(),
+      aliases: aliases()
     ]
   end
 
@@ -20,6 +20,8 @@ defmodule Exproj.MixProject do
   def application do
     [
       extra_applications: [:logger],
+      env: [],
+      mod: {Exproj.Application, []}
     ]
   end