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Expand docker.config section (#1316)

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Highlight the benefit of doing this if using 2FA on Docker Hub
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EDIflyer 2022-08-04 13:43:14 +01:00 • committed by GitHub
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docs/usage-overview.md
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@ -27,12 +27,12 @@ docker run -d \
Also check out [this Stack Overflow answer](https://stackoverflow.com/a/30494145/7872793) for more options on how to pass environment variables.
Mounting the host's docker config file:
Alternatively if you 2FA authentication setup on Docker Hub then passing username and password will be insufficient. Instead you can run `docker login` to store your credentials in `$HOME/.docker/config.json` and then mount this config file to make it available to the Watchtower container:
```bash
docker run -d \
--name watchtower \
-v /home/<user>/.docker/config.json:/config.json \
-v $HOME/.docker/config.json:/config.json \
-v /var/run/docker.sock:/var/run/docker.sock \
containrrr/watchtower container_to_watch --debug
```