Add maintenance mode and update announce

app/Models/Maintenance.ts

@@ -0,0 +1,25 @@
+import { DateTime } from 'luxon'
+import {BaseModel, BelongsTo, belongsTo, column} from '@ioc:Adonis/Lucid/Orm'
+import Translation from "App/Models/Translation";
+
+export default class Maintenance extends BaseModel {
+  @column({ isPrimary: true })
+  public id: number
+
+  @column()
+  public active: boolean
+
+  @belongsTo(() => Translation, {
+    foreignKey: 'reasonId'
+  })
+  public reason: BelongsTo<typeof Translation>
+
+  @column()
+  public reasonId: number
+
+  @column.dateTime({ autoCreate: true })
+  public createdAt: DateTime
+
+  @column.dateTime({ autoCreate: true, autoUpdate: true })
+  public updatedAt: DateTime
+}