Add support for swagger customization options

[fwoelffel]

TLDR; This should resolve #42

Disclaimer: This was pretty straightforward to implement, I haven't tested it yet.

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This PR adds the support for the swagger-ui-express customization options defined here: https://github.com/scottie1984/swagger-ui-express/blob/master/index.js#L13

You should now, for example, be able to customize your SwaggerUI CSS:

import { NestFactory } from '@nestjs/core';
import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
import { ApplicationModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(ApplicationModule);

  const options = new DocumentBuilder()
    .setTitle('Cats example')
    .setDescription('The cats API description')
    .setVersion('1.0')
    .addTag('cats')
    .build();
  const document = SwaggerModule.createDocument(app, options);
  SwaggerModule.setup('/api', app, document, {
    customCss: "<your CSS rules>"
  });

  await app.listen(3001);
}
bootstrap();

I may add some documentation to the code in the days to come.

[kamilmysliwiec]

same here @fwoelffel, would you like to provide some small docs about it? 💪

[kamilmysliwiec]

Merge 🔥 thanks @fwoelffel!

[webhacking]

@kamilmysliwiec Current version does not supported this property

[FerLuisxd]

is this still working? how Can I import a .css file and convert it into a single string?

[kamilmysliwiec]

It is still working. If you have any issues, please, report them here https://github.com/scottie1984/swagger-ui-express

is this still working? how Can I import a .css file and convert it into a single string?

@FerLuisxd you can use the customCssUrl property instead, e.g., customCssUrl: '/custom.css'