feat(builder): scale the web process by 1

If no container structure has been specified for a release, we
can safely assume that a web process exists. The application
should be scaled by 1.

Author: Matthew Fisher

controller/api/models.py

@@ -123,7 +123,12 @@ def destroy(self, *args, **kwargs):
             c.destroy()
 
     def deploy(self, release):
-        return tasks.deploy_release.delay(self, release).get()
+        tasks.deploy_release.delay(self, release).get()
+        if self.structure == {}:
+            # scale the web process by 1 initially
+            self.structure = {'web': 1}
+            self.save()
+            self.scale()
 
     def scale(self, **kwargs):
         """Scale containers up or down to match requested."""