first commit

app/controllers/application_controller.rb

@@ -0,0 +1,9 @@
+class ApplicationController < ActionController::API
+  rescue_from ActiveRecord::RecordNotFound, with: :render_not_found
+
+  private
+
+  def render_not_found
+    render json: { error: "not_found" }, status: :not_found
+  end
+end