We've already defined a few basic versioning rules in Chapter 3, Building a Typical Web API. Let's apply them to the MongoDB database-aware module we implemented in the previous chapter. Our starting point would be to enable the current consumers of the API to continue using the same version on a different URL. This will keep them backward-compatible until they adopt and successfully test the new version.
Keeping a REST API stable is not a question of only moving one endpoint from one URI to another. It makes no sense to perform redirection and afterward have an API that behaves differently. Thus, we need to ensure that the behavior of the moved endpoint stays the same. To ensure that we don't change the previously implemented behavior, let's move the current behavior from the catalog.js module to a new module by renaming the...
