Copied over the relevant parts from the README

Christian Mäder
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**Important: Also consider [the advice about configuring Netbox for production](configuration#configure-for-production) above!**
You may run this image in a cluster such as Docker Swarm, Kubernetes or OpenShift, but this is advanced level.
In this case, we encourage you to statically configure Netbox by starting from [Netbox's example config file][default-config], and mounting it into your container in the directory `/etc/netbox/config/` using the mechanism provided by your container platform (i.e. [Docker Swarm configs][swarm-config], [Kubernetes ConfigMap][k8s-config], [OpenShift ConfigMaps][openshift-config]).
But if you rather continue to configure your application through environment variables, you may continue to use [the built-in configuration file][docker-config].
**We discourage storing secrets in environment variables**, as environment variable are passed on to all sub-processes and may leak easily into other systems, e.g. error collecting tools that often collect all environment variables whenever an error occurs.
Therefore we *strongly advise* to make use of the secrets mechanism provided by your container platform (i.e. [Docker Swarm secrets][swarm-secrets], [Kubernetes secrets][k8s-secrets], [OpenShift secrets][openshift-secrets]).
[The configuration file][docker-config] and [the entrypoint script][entrypoint] try to load the following secrets from the respective files.
If a secret is defined by an environment variable and in the respective file at the same time, then the value from the environment variable is used.
* `SUPERUSER_PASSWORD`: `/run/secrets/superuser_password`
* `SUPERUSER_API_TOKEN`: `/run/secrets/superuser_api_token`
* `DB_PASSWORD`: `/run/secrets/db_password`
* `SECRET_KEY`: `/run/secrets/secret_key`
* `EMAIL_PASSWORD`: `/run/secrets/email_password`
* `NAPALM_PASSWORD`: `/run/secrets/napalm_password`
* `REDIS_PASSWORD`: `/run/secrets/redis_password`
* `AUTH_LDAP_BIND_PASSWORD`: `/run/secrets/auth_ldap_bind_password`
[docker-config]: https://github.com/netbox-community/netbox-docker/blob/master/configuration/configuration.py
[default-config]: https://github.com/netbox-community/netbox/blob/develop/netbox/netbox/configuration.example.py
[entrypoint]: https://github.com/netbox-community/netbox-docker/blob/master/docker/docker-entrypoint.sh
[swarm-config]: https://docs.docker.com/engine/swarm/configs/
[swarm-secrets]: https://docs.docker.com/engine/swarm/secrets/
[openshift-config]: https://docs.openshift.org/latest/dev_guide/configmaps.html
[openshift-secrets]: https://docs.openshift.org/latest/dev_guide/secrets.html
[k8s-secrets]: https://kubernetes.io/docs/concepts/configuration/secret/
[k8s-config]: https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/
## Community-maintained Deployments
* [bootc/netbox][netbox-helm]
* [CENGN/netbox-kubernetes][netbox-kubernetes]
[netbox-kubernetes]: https://github.com/CENGN/netbox-kubernetes
[netbox-helm]: https://github.com/bootc/netbox-chart