move approvals to the new controller

app/controllers/approvals_controller.rb

@@ -0,0 +1,21 @@
+class ApprovalsController < ApplicationController
+  include MedicalReleaseContext
+
+  before_action :set_medical_release
+  before_action :set_project
+
+  layout "project"
+
+  def create
+    @medical_release.approve_by(current_user)
+    if @medical_release.save
+      redirect_to [@project, :medical_releases], notice: t('.release_approved')
+    end
+  end
+
+  private
+
+  def set_project
+    @project = @medical_release.project
+  end
+end