fix: simplify Docker registry configuration by removing unnecessary authentication settings

nodes/heimdall/docker_registry/compose.yaml

@@ -1,24 +1,13 @@
 services:
   registry:
     image: registry:2
+    container_name: docker_registry
     restart: always
     environment:
-      - REGISTRY_AUTH=htpasswd
-      - REGISTRY_AUTH_HTPASSWD_REALM=Registry
-      # We point this to a path that we will 'fake' inside the container
-      - REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd
       - REGISTRY_STORAGE_DELETE_ENABLED=true
-      - REGISTRY_HTTP_SECRET=something_very_random_and_long
-      # We pass the raw hash string here
-      - HT_CONTENTS=${REGISTRY_AUTH_HTPASSWD_CONTENTS}
-    # Create the file on the fly before the registry starts
-    command: 
-      - sh
-      - -c
-      - |
-        mkdir -p /auth
-        echo "${HT_CONTENTS}" | base64 -d > /auth/htpasswd
-        exec bin/registry serve /etc/docker/registry/config.yml
+      - REGISTRY_HTTP_SECRET=temporary_secret_123
+    volumes:
+      - /mnt/appdata/docker_registry/data:/var/lib/registry
     networks:
       - proxy-net
     labels: