Initialize NestJS project with essential configuration files and structure

- Added .env.example for application timezone configuration.
- Created .gitignore to exclude unnecessary files and directories.
- Introduced Prettier configuration in .prettierrc for code formatting.
- Set up ESLint configuration in eslint.config.mjs for code quality checks.
- Added nest-cli.json for NestJS project settings.
- Created package.json with project dependencies and scripts for building, testing, and running the application.
- Generated pnpm-lock.yaml for package management.
- Added README.md with project description and setup instructions.
- Created initial application structure with AppModule, AppController, and AppService.
- Implemented basic unit and e2e tests for the application.

test/app.e2e-spec.ts

@@ -0,0 +1,29 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { INestApplication } from '@nestjs/common';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { AppModule } from './../src/app.module';
+
+describe('AppController (e2e)', () => {
+  let app: INestApplication<App>;
+
+  beforeEach(async () => {
+    const moduleFixture: TestingModule = await Test.createTestingModule({
+      imports: [AppModule],
+    }).compile();
+
+    app = moduleFixture.createNestApplication();
+    await app.init();
+  });
+
+  it('/ (GET)', () => {
+    return request(app.getHttpServer())
+      .get('/')
+      .expect(200)
+      .expect('Hello World!');
+  });
+
+  afterEach(async () => {
+    await app.close();
+  });
+});

test/jest-e2e.json

@@ -0,0 +1,9 @@
+{
+  "moduleFileExtensions": ["js", "json", "ts"],
+  "rootDir": ".",
+  "testEnvironment": "node",
+  "testRegex": ".e2e-spec.ts$",
+  "transform": {
+    "^.+\\.(t|j)s$": "ts-jest"
+  }
+}