Update README.md

Author: aleksanderbl29

README.md

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 [![Build and publish container](https://github.com/aleksanderbl29/docker-pihole-unbound/actions/workflows/auto-build-container.yml/badge.svg)](https://github.com/aleksanderbl29/docker-pihole-unbound/actions/workflows/auto-build-container.yml)
 [![Docker Pulls](https://img.shields.io/docker/pulls/aleksanderbl/pihole-unbound)](https://hub.docker.com/r/aleksanderbl/pihole-unbound)
 
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 ## Use Docker to run [Pi-Hole](https://pi-hole.net) with an upstream [Unbound](https://nlnetlabs.nl/projects/unbound/about/) resolver
 
 - Install Unbound directly into the Pi-Hole container