Add possibility to configure own path to `/api-docs/swagger.json`

[vkatsuba]

The /api-docs/swagger.json is hardcoded at https://github.com/inaka/cowboy_swagger/blob/2.7.0/priv/swagger/swagger-initializer.js#L6 and it lead to issues if few dependencies in the project are use this great library for creating Swagger. It will be nice if path to /swagger.json can be configured or at least depended by name of application where this library is used.

[elbrujohalcon]

For reference, it's set here:

cowboy_swagger/.github/workflows/up_swagger.sh

Line 25 in 24334d8

REPLACE="window.location.origin + \"/api-docs/swagger.json\""

[paulo-ferraz-oliveira]

There's this: #204

I don't know if you also want to review, @vkatsuba, or maybe just cheer for the developer 😄

[vkatsuba]

Nice! It looks like I not only one person who want to have it! 😄