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';