Changed to cache all traffic throught proxy.

docs/compose/docker-compose.yml

@@ -8,6 +8,9 @@ services:
     environment:
       - CACHE_MAX_SIZE=256g
       - ENABLE_MANIFEST_CACHE=true
+      # Enable/disable internet access, possible variants "on"/"off".
+      # After load all data into cache switch to "off" for offline usage.
+      - PROXY_CACHE_REVALIDATE=on
     volumes:
       # Format: <host-path>:<container-path>; adapt to your needs
       - ./docker_mirror_cache:/docker_mirror_cache # This will be up to CACHE_MAX_SIZE big