added registry deployment

.gitignore

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+.env
+data

docker-compose.yml

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+---
+services:
+  registry:
+    image: registry:${REGISTRY_VERSION}
+    restart: unless-stopped
+    ports:
+      - ${REGISTRY_PORT}:5000
+    volumes:
+      - ${REGISTRY_DATA}:/var/lib/registry

example.env

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+# Docker Registry
+REGISTRY_VERSION=2.8.2
+REGISTRY_PORT=5000
+REGISTRY_DATA=./data