Add instance info support

db/migrate/20230804222017_create_instance_infoes.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class CreateInstanceInfoes < ActiveRecord::Migration[7.0]
+  def change
+    create_table :instance_infos do |t|
+      t.string :domain, null: false, default: '', index: { unique: true }
+      t.string :software, null: false, default: ''
+      t.string :version, null: false, default: ''
+      t.jsonb :data, null: false, default: {}
+      t.datetime :created_at, null: false
+      t.datetime :updated_at, null: false
+    end
+  end
+end