feat: graphql + typeorm + config + postgresql

src/app.module.ts

@@ -1,10 +1,42 @@
 import { Module } from '@nestjs/common';
+import { ConfigModule, ConfigService } from '@nestjs/config';
+import { GraphQLModule } from '@nestjs/graphql';
+import { TypeOrmModule } from '@nestjs/typeorm';
 import { AppController } from './app.controller';
+import { AppResolver } from './app.resolver';
 import { AppService } from './app.service';
+import configuration from './commons/config/configuration';
 
 @Module({
-  imports: [],
+  imports: [
+    ConfigModule.forRoot({
+      load: [configuration],
+    }),
+    TypeOrmModule.forRootAsync({
+      imports: [ConfigModule],
+      useFactory: (cnfigService: ConfigService) => ({
+        type: 'postgres',
+        host: cnfigService.get<string>('db.postgres.host'),
+        port: cnfigService.get<number>('db.postgres.port'),
+        username: cnfigService.get<string>('db.postgres.username'),
+        password: cnfigService.get<string>('db.postgres.password'),
+        database: cnfigService.get<string>('db.postgres.database'),
+        synchronize: true,
+        autoLoadEntities: true,
+      }),
+      inject: [ConfigService],
+    }),
+    GraphQLModule.forRootAsync({
+      imports: [ConfigModule],
+      useFactory: (cnfigService: ConfigService) => ({
+        debug: cnfigService.get<string>('env') !== 'prod',
+        playground: true,
+        autoSchemaFile: true,
+      }),
+      inject: [ConfigService],
+    }),
+  ],
   controllers: [AppController],
-  providers: [AppService],
+  providers: [AppService, AppResolver],
 })
 export class AppModule {}

src/app.resolver.ts

@@ -0,0 +1,10 @@
+import { Query, Resolver } from '@nestjs/graphql';
+import { Hello } from './hello';
+
+@Resolver(() => Hello)
+export class AppResolver {
+  @Query(() => Hello)
+  async hello() {
+    return { message: 'Hello, World!' };
+  }
+}

src/commons/config/configuration.ts

@@ -0,0 +1,9 @@
+import { readFileSync } from 'fs';
+import * as yaml from 'js-yaml';
+import { join } from 'path';
+
+export default () => {
+  return yaml.load(
+    readFileSync(join(__dirname, '../../../config.yml'), 'utf8'),
+  ) as unknown;
+};

src/hello.ts

@@ -0,0 +1,7 @@
+import { Field, ObjectType } from '@nestjs/graphql';
+
+@ObjectType()
+export class Hello {
+  @Field()
+  message: string;
+}

src/main.ts

@@ -1,8 +1,10 @@
+import { ConfigService } from '@nestjs/config';
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
-  await app.listen(7122);
+  const configService = app.get(ConfigService);
+  await app.listen(configService.get<number>('http.port'));
 }
 bootstrap();