async function bootstrap() {
    const app = await NestFactory.create<NestExpressApplication>(AppModule);
    const asyncApiOptions = new AsyncApiDocumentBuilder()
        .setTitle('Feline')
        .setDescription('Feline server description here')
        .setVersion('1.0')
        .setDefaultContentType('application/json')
        .addSecurity('user-password', {type: 'userPassword'})
        .addServer('feline-ws', {
            url: 'ws://localhost:3000',
            protocol: 'socket.io',
        })
        .build();
    const asyncapiDocument = await AsyncApiModule.createDocument(app, asyncApiOptions);
    await AsyncApiModule.setup(docRelPath, app, asyncapiDocument);
    // other bootstrap procedures here
    return app.listen(3000);
}

class CreateFelineDto {
    @ApiProperty()
    demo: string;
}
@Controller()
class DemoController {
    @AsyncApiPub({
        channel: 'create/feline',
        message: {
            payload: CreateFelineDto
        },
    })
    async createFeline() {
        // logic here
    }
    @AsyncApiSub({
        channel: 'create/feline',
        message: {
            payload: CreateFelineDto
        },
    })
    async createFeline() {
        // logic here
    }
}