changed docker file nest to avoid rebuild everything each time, and small changes in chat gateway

tests_hugo/nest_course/src/app.controller.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+
+describe('AppController', () => {
+  let appController: AppController;
+
+  beforeEach(async () => {
+    const app: TestingModule = await Test.createTestingModule({
+      controllers: [AppController],
+      providers: [AppService],
+    }).compile();
+
+    appController = app.get<AppController>(AppController);
+  });
+
+  describe('root', () => {
+    it('should return "Hello World!"', () => {
+      expect(appController.getHello()).toBe('Hello World!');
+    });
+  });
+});

tests_hugo/nest_course/src/app.controller.ts

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+import { Controller, Get } from '@nestjs/common';
+import { AppService } from './app.service';
+
+@Controller()
+export class AppController {
+  constructor(private readonly appService: AppService) {}
+
+  @Get()
+  getHello(): string {
+    return this.appService.getHello();
+  }
+}

tests_hugo/nest_course/src/app.module.ts

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+import { Module } from '@nestjs/common';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+import { CoffeesController } from './coffees/coffees.controller';
+import { CoffeesService } from './coffees/coffees.service';
+
+@Module({
+  imports: [],
+  controllers: [AppController, CoffeesController],
+  providers: [AppService, CoffeesService],
+})
+export class AppModule {}

tests_hugo/nest_course/src/app.service.ts

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+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class AppService {
+  getHello(): string {
+    return 'Hello nest!';
+  }
+}

tests_hugo/nest_course/src/coffees/coffees.controller.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { CoffeesController } from './coffees.controller';
+
+describe('CoffeesController', () => {
+  let controller: CoffeesController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [CoffeesController],
+    }).compile();
+
+    controller = module.get<CoffeesController>(CoffeesController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});

tests_hugo/nest_course/src/coffees/coffees.controller.ts

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+import {
+	Controller,
+	Get,
+	Param,
+	Post,
+	Body,
+	HttpCode,
+	HttpStatus,
+	Patch,
+	Delete,
+	Query
+} from '@nestjs/common';
+import { CoffeesService } from './coffees.service';
+
+@Controller('coffees')
+export class CoffeesController {
+	constructor(private readonly coffeesService: CoffeesService) {}
+
+	@Get()
+	findAll(@Query() paginationQuery) {
+	//	const { limit, offset } = paginationQuery;
+		return this.coffeesService.findAll();
+	}
+
+	@Get(':id')
+	findOne(@Param('id') id: string) {
+		return this.coffeesService.findOne(id);
+	}
+
+	@Post()
+	//@HttpCode(HttpStatus.GONE)
+	create(@Body() body) {
+		return this.coffeesService.create(body);
+	}
+
+	@Patch(':id')
+	update(@Param('id') id: string, @Body() body) {
+		return this.coffeesService.update(id, body);
+	}
+
+	@Delete(':id')
+	remove(@Param('id') id: string) {
+		return this.coffeesService.remove(id);
+	}
+}

tests_hugo/nest_course/src/coffees/coffees.service.spec.ts

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+import { Test, TestingModule } from '@nestjs/testing';
+import { CoffeesService } from './coffees.service';
+
+describe('CoffeesService', () => {
+  let service: CoffeesService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [CoffeesService],
+    }).compile();
+
+    service = module.get<CoffeesService>(CoffeesService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});

tests_hugo/nest_course/src/coffees/coffees.service.ts

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+import { Injectable } from '@nestjs/common';
+import { Coffee } from './entities/coffee.entity';
+
+@Injectable()
+export class CoffeesService {
+
+	private coffees: Coffee[] = [
+		{
+			id: 1,
+			name: 'arabica',
+			brand: 'illy',
+			flavors: ['chocolate', 'vanilla'],
+		}
+	];
+
+	findAll() {
+		return this.coffees;
+	}
+
+	findOne(id: string) {
+		return this.coffees.find(item => item.id === +id);
+	}
+
+	create(createCoffeeDto: any) {
+	 this.coffees.push(createCoffeeDto);
+	}
+
+	update(id: string, updateCoffeeDto: any) {
+		const existingCoffee = this.findOne(id);
+		if (existingCoffee) {
+			// update the existing entity
+		}
+	}
+
+	remove(id: string) {
+		const coffeeIndex = this.coffees.findIndex(item => item.id === +id);
+		if (coffeeIndex >= 0) {
+			this.coffees.splice(coffeeIndex, 1);
+		}
+	}
+}
+

tests_hugo/nest_course/src/coffees/entities/coffee.entity.ts

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+export class Coffee {
+	id: number;
+	name: string;
+	brand: string;
+	flavors: string[];
+}

tests_hugo/nest_course/src/main.ts

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+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  await app.listen(3000);
+}
+bootstrap();