Arrange resources alphanumerically in Swagger-Ui

Currently the order of the tags in Swagger API documentation are determined by Swagger-UI itself.

To sort them alphanumerically, we can pass `tagsSorter` config param (with value `alpha`) as an argument to SwaggerUIBundle

SwaggerUIBundle({
    tagsSorter: 'alpha'
})

Refer to:
swagger-ui/blob/master/docs/usage/configuration.md

What to do:

Simply add tagSorter param as an argument to SwaggerUIBundle in here.