Directing to an alternate host

To proxy to another host, use the localUrl property in the configuration file.

For example, in the case you're running a local API server on port 8080 and you want to intercept traffic to and proxy it to your local http://localhost:8080, you'd set the following properties

target: 'http://localhost:8080',
localUrl: ''

i.e. the target is where traffic gets proxied to, and the localUrl is the host, port and protocol to listen on locally.