Refactor code structure for improved readability and maintainability

src/app/app.module.ts

@@ -0,0 +1,31 @@
+import { Module } from "@nestjs/common";
+import { TypeOrmModule } from "@nestjs/typeorm";
+import { ConfigModule } from "@nestjs/config";
+import { User } from "../entities/user.entity";
+import { UserService } from "../services/user.service";
+
+@Module({
+  imports: [
+    ConfigModule.forRoot({
+      isGlobal: true,
+      envFilePath: ".env",
+    }),
+    TypeOrmModule.forRoot({
+      type: "mariadb",
+      host: process.env.DB_HOST || "localhost",
+      port: parseInt(process.env.DB_PORT) || 3306,
+      username: process.env.DB_USERNAME || "root",
+      password: process.env.DB_PASSWORD || "",
+      database: process.env.DB_DATABASE || "low_code_engine",
+      entities: [__dirname + "/../**/*.entity{.ts,.js}"],
+      migrations: [__dirname + "/../migrations/*{.ts,.js}"],
+      synchronize: process.env.NODE_ENV === "development",
+      migrationsRun: process.env.NODE_ENV === "production",
+      autoLoadEntities: true,
+    }),
+    TypeOrmModule.forFeature([User]),
+  ],
+  controllers: [],
+  providers: [UserService],
+})
+export class AppModule {}