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Question about a lot of traffic between docker and PiHole

Hi, i have PiHole installed inside a docker container in a Debian/Linux host; what i saw is that with something like 80000 requests that PiHole registered, 92-93% of them are made to two domains, 60-70% of them to “registry-1.docker.io” and the rest of them to “auth.docker.io”, the remaining 7% is regular traffic.
Anybody know if it’s normal?
Eventualy what can i do to reduce requests’s quantity (if it’s possible of course)?
Thank you all in advance

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