Unable to generate the swagger.json file

[abdullateef97]

I have attempted to follow the examples here to a T, but I'm still unable to generate the swagger.json file.
This is how my configuration looks like
// Config

const version = process.env.VERSION;
const swaggerDefinition = {
  openapi: '3.0.1',
  info: {
    title: 'Demo server',
    version,
    description: 'Fida',
  },
  servers: [
    {
      url: '/api/v1',
      description: 'Host system path',
    },
  ],
  definition: {},
  paths: {},
};

// options for the swagger docs
const options = (fileName) => ({
  // import swaggerDefinitions
  swaggerDefinition,
  // path to the API docs
  apis: [fileName],
});

export default options;

src/main.ts file

  private readonly app: Express;
    constructor() {
       this.app = express();
       
       this.config();
       this.routes()
   }

    private config(): void {
    if (process.env.NODE_ENV === 'dev') {

      this.app.use(getResponseExpress(this.app, options(__filename), './src/swagger.json'));
    }
  }

When I make my requests, the swagget.json file isn't updated