Installs nextdns client in a Debian Slim Docker image: https://github.com/nextdns/nextdns

You can set a few variables depending on your needs:

• NEXTDNS_ID=ff0000: Set to the ID of your NextDNS configuration
• NEXTDNS_ARGUMENTS: set to the arguments for the run command.

This container will listen on 53 tcp and udp. Most likely you want to bind it to a local port:

docker run -p 53:53/tcp -p 53:53/udp
  -e NEXTDNS_ID=000000 \
  --name nextdns \
  steeef/nextdns

NOTE: this image does not include a DNS server with anything like caching. For that you should link this to an instance of dnsmasq or unbound.