Minikube-based development environment

Works in conjunction with https://github.com/ansible/awx-operator/pull/71

See docs/development/minikube.md

installer/build.yml

@@ -3,5 +3,6 @@
   hosts: localhost
   gather_facts: true
   roles:
+    - {role: dockerfile}
     - {role: image_build}
     - {role: image_push, when: "docker_registry is defined"}