refactor(infra): directory structure (#4615)

packages/backend/server/src/prisma/index.ts

@@ -0,0 +1,11 @@
+import { Global, Module } from '@nestjs/common';
+
+import { PrismaService } from './service';
+
+@Global()
+@Module({
+  providers: [PrismaService],
+  exports: [PrismaService],
+})
+export class PrismaModule {}
+export { PrismaService } from './service';

packages/backend/server/src/prisma/service.ts

@@ -0,0 +1,17 @@
+import type { OnModuleDestroy, OnModuleInit } from '@nestjs/common';
+import { Injectable } from '@nestjs/common';
+import { PrismaClient } from '@prisma/client';
+
+@Injectable()
+export class PrismaService
+  extends PrismaClient
+  implements OnModuleInit, OnModuleDestroy
+{
+  async onModuleInit() {
+    await this.$connect();
+  }
+
+  async onModuleDestroy(): Promise<void> {
+    await this.$disconnect();
+  }
+}