Implement basic initializer

lib/laradi/middleware.rb

@@ -0,0 +1,12 @@
+module Laradi
+  class Middleware
+
+    def initialize(app)
+      @app = app
+    end
+
+    def call(env)
+      @app.call(env)
+    end
+  end
+end

lib/laradi/railtie.rb

@@ -1,4 +1,13 @@
 module Laradi
   class Railtie < ::Rails::Railtie
+    initializer "laradi.construct_di_container" do |app|
+      container = Dry::Core::Container.new
+
+      if defined?(config.di_config)
+        config.di_config.call(container)
+      end
+
+      $autoinject = Dry::AutoInject(container)
+    end
   end
 end