add typorm migration

src/data-source.ts

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+import 'reflect-metadata';
+import { DataSource } from 'typeorm';
+import { User } from './entity/user';
+
+import * as dotenv from 'dotenv';
+
+dotenv.config();
+
+export const AppDataSource = new DataSource({
+  type: 'postgres',
+  host: process.env.DATABASE_HOST,
+  port: parseInt(process.env.DATABASE_PORT as string, 10),
+  username: process.env.DATABASE_USER,
+  password: process.env.DATABASE_PASS,
+  database: process.env.DATABASE_NAME,
+  synchronize: false,
+  logging: false,
+  entities: [User],
+  migrations: [
+    'src/migration/**/*.ts'
+  ],
+  subscribers: [],
+});

src/entity/user.ts

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+import { Entity, Column, PrimaryGeneratedColumn } from "typeorm"
+
+@Entity()
+export class User {
+  @PrimaryGeneratedColumn()
+  id: number
+
+  @Column()
+  username: string
+
+  @Column()
+  email: string
+
+  @Column()
+  password: string
+}

src/migration/1761571888108-add_user_table.ts

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+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddUserTable1761571888108 implements MigrationInterface {
+  name = 'AddUserTable1761571888108';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `CREATE TABLE "user" ("id" SERIAL NOT NULL, "username" character varying NOT NULL, "email" character varying NOT NULL, "password" character varying NOT NULL, CONSTRAINT "PK_cace4a159ff9f2512dd42373760" PRIMARY KEY ("id"))`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP TABLE "user"`);
+  }
+}