Move registry address into Drone configuration.

.drone.yml

@@ -38,6 +38,7 @@ steps:
     pull: if-not-exists
     environment:
       DOCKER_HOST: tcp://docker:2375
+      REGISTRY: code.pztrn.name
       REGISTRY_USER: drone
       REGISTRY_PASSWORD:
         from_secret: drone_secret

mirror.sh

@@ -1,9 +1,8 @@
 #!/usr/bin/env bash
 
 # The Docker Image Mirror script.
-
 WHAT_TO_MIRROR=()
-DESTINATION_REGISTRY=code.pztrn.name
+DESTINATION_REGISTRY=${REGISTRY}
 DESTINATION_PROJECT=${DESTINATION_REGISTRY}/containers/mirror
 USER=${REGISTRY_USER}
 PASSWORD=${REGISTRY_PASSWORD}