introduce a weather module

src/weather/weather.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { MongooseModule } from '@nestjs/mongoose';
+import { WeatherSchema } from './models/weather.model';
+import { WeatherService } from './weather.service';
+
+@Module({
+  imports: [
+    MongooseModule.forFeature([{ name: 'weather', schema: WeatherSchema }]),
+  ],
+  providers: [WeatherService],
+  exports: [MongooseModule, WeatherService],
+})
+export class WeatherModule {}