feat: PWA Support (#1488)

server/entity/UserPushSubscription.ts

@@ -0,0 +1,27 @@
+import { Column, Entity, ManyToOne, PrimaryGeneratedColumn } from 'typeorm';
+import { User } from './User';
+
+@Entity()
+export class UserPushSubscription {
+  @PrimaryGeneratedColumn()
+  public id: number;
+
+  @ManyToOne(() => User, (user) => user.pushSubscriptions, {
+    eager: true,
+    onDelete: 'CASCADE',
+  })
+  public user: User;
+
+  @Column()
+  public endpoint: string;
+
+  @Column()
+  public p256dh: string;
+
+  @Column({ unique: true })
+  public auth: string;
+
+  constructor(init?: Partial<UserPushSubscription>) {
+    Object.assign(this, init);
+  }
+}