Configure Docker credentials when fetching Concourse resources

Author: bclozel

ci/pipeline.yml

@@ -2,6 +2,9 @@ anchors:
   docker-hub-task-params: &docker-hub-task-params
     DOCKER_HUB_USERNAME: ((docker-hub-username))
     DOCKER_HUB_PASSWORD: ((docker-hub-password))
+  registry-image-resource-source: &registry-image-resource-source
+    username: ((docker-hub-username))
+    password: ((docker-hub-password))
   gradle-enterprise-task-params: &gradle-enterprise-task-params
     GRADLE_ENTERPRISE_ACCESS_KEY: ((gradle_enterprise_secret_access_key))
     GRADLE_ENTERPRISE_CACHE_USERNAME: ((gradle_enterprise_cache_user.username))
@@ -24,16 +27,19 @@ resource_types:
 - name: registry-image
   type: registry-image
   source:
+    <<: *registry-image-resource-source
     repository: concourse/registry-image-resource
     tag: 1.5.0
 - name: artifactory-resource
   type: registry-image
   source:
+    <<: *registry-image-resource-source
     repository: springio/artifactory-resource
     tag: 0.0.17
 - name: github-release
   type: registry-image
   source:
+    <<: *registry-image-resource-source
     repository: concourse/github-release-resource
     tag: 1.5.5