Registry version updated

Docker registry 2.3.0 contains great improvements for the docker push command in terms to avoid unneeded uploads.

Author: darkxeno

Dockerfile

@@ -1,2 +1,2 @@
-FROM registry:2.2.1
-COPY config.yml /etc/docker/registry/config.yml
+FROM registry:2.3.0
+COPY config.yml /etc/docker/registry/config.yml