Initialize config repository
diff --git a/nodepool/elements/README b/nodepool/elements/README
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+Customs diskimage builder elements to be used by nodepool-builder.
+
+Nodepool is configured to use by default (with low precedence):
+* https://softwarefactory-project.io/r/software-factory/sf-elements
+* git://git.openstack.org/openstack-infra/project-config/nodepool/elements