Export a Swagger JSON/YAML file

I’m submitting a…

[ ] Regression 
[ ] Bug report
[x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Do we have an ability to export a Swagger JSON/YAML file from Swagger UI? Question from Statckoverflow

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

It could be better if I can export a Swagger JSON/YAML file and send it to someone rather than hosting the doc on the server.

Environment

Nest version: 5.3.11

 
For Tooling issues:
- Node version: 8.4.0  
- Platform: Windows 

Others:

[kamilmysliwiec]

If your Swagger doc is available behind, let’s say, https://localhost:3000/api simply use https://localhost:3000/api-json to get JSON object.

[webhacking]

Write it to the file system like this:

const app = await NestFactory.create(ApplicationModule);
const options = new DocumentBuilder()
    .setTitle("Title")
    .setDescription("description")
    .setVersion("1.0")
    .build();
const document = SwaggerModule.createDocument(app, options);

fs.writeFileSync("./swagger-spec.json", JSON.stringify(document));
SwaggerModule.setup("/api", app, document);