ADD model mirror

db/migrate/20200518081445_create_mirrors.rb

@@ -0,0 +1,12 @@
+class CreateMirrors < ActiveRecord::Migration[5.2]
+  def change
+    create_table :mirrors do |t|
+      t.integer :repo_id, foreign_key: true
+      t.integer :status, default: 0, null: false, comment: "0 - succeeded, 1 - waiting, 2 - failed"
+      t.integer :interval, comment: "mirror interval with unix time"
+      t.datetime :next_update_time, comment: "next update mirror time, for datetime"
+
+      t.timestamps
+    end
+  end
+end