Feature: Webhooks (#489)

app/models/webhook.rb

@@ -0,0 +1,20 @@
+# == Schema Information
+#
+# Table name: webhooks
+#
+#  id         :bigint           not null, primary key
+#  urls       :string
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  account_id :integer
+#  inbox_id   :integer
+#
+
+class Webhook < ApplicationRecord
+  belongs_to :account
+  belongs_to :inbox
+
+  validates :account_id, presence: true
+  validates :inbox_id, presence: true
+  serialize :urls, Array
+end