Fix canonical URL when setting either port of host from the CLI (#196)

* Fix canonical URL when setting either port of host from the CLI

* Fix canonical URL (reformatted)

Co-authored-by: Ran Katzir <ran.katzir@valerann.com>
Co-authored-by: Taybin Rutkin <taybin@users.noreply.github.com>

faust/cli/worker.py

@@ -99,6 +99,10 @@ def _init_worker_options(
             self.app.conf.web_host = web_host
         if web_transport is not None:
             self.app.conf.web_transport = web_transport
+        if web_port is not None or web_host is not None:
+            self.app.conf.canonical_url = (
+                f"http://{self.app.conf.web_host}:{self.app.conf.web_port}"
+            )
 
     @property
     def _Worker(self) -> Type[Worker]: