README Update: Parameters with defaults should be optional

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Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

This could be opinionated but at least based off the root/etc/s6-overlay/s6-rc.d/init-netbox-config/run file, it looks like we're already populating parameters with default values making us refill the same parameters redundant.

Example:

NETBOX_CONF[REDIS_PASSWORD]=${REDIS_PASSWORD:-}
NETBOX_CONF[REDIS_DB_TASK]=${REDIS_DB_TASK:-0}
NETBOX_CONF[REDIS_DB_CACHE]=${REDIS_DB_CACHE:-1}

As it currently stands all these parameters (even with the same default values) are required.

Expected Behavior

Based off the above, these parameters should be considered optional, at least the parameters with a valid default value.

IE ALLOWED_HOST would still be required as it's default value isn't usable:

NETBOX_CONF[ALLOWED_HOST]=${ALLOWED_HOST:-netbox.example.com}

If nothing else, if this is more of an opinionated stance, REDIS_PASSWORD at a minimal should be removed from this requirement since by default Redis does not use a password.

Steps To Reproduce

In README.

Environment

- OS: Unraid
- How docker service was installed: Via Template

CPU architecture

x86-64

Docker creation

docker run
  -d
  --name='netbox'
  --net='internet'
  -e TZ="UTC"
  -e HOST_OS="Unraid"
  -e HOST_HOSTNAME="#####"
  -e HOST_CONTAINERNAME="netbox"
  -e 'SUPERUSER_EMAIL'='#####'
  -e 'SUPERUSER_PASSWORD'='#####'
  -e 'ALLOWED_HOST'='#####'
  -e 'DB_NAME'='netbox'
  -e 'DB_USER'='netbox'
  -e 'DB_PASSWORD'='#####'
  -e 'DB_HOST'='postgresql15-netbox'
  -e 'DB_PORT'='5432'
  -e 'REDIS_HOST'='redis-netbox'
  -e 'REDIS_PORT'='6379'
  -e 'REDIS_PASSWORD'=''
  -e 'REDIS_DB_TASK'=''
  -e 'REDIS_DB_CACHE'=''
  -e 'BASE_PATH'=''
  -e 'REMOTE_AUTH_ENABLED'=''
  -e 'REMOTE_AUTH_BACKEND'=''
  -e 'REMOTE_AUTH_HEADER'=''
  -e 'REMOTE_AUTH_AUTO_CREATE_USER'=''
  -e 'REMOTE_AUTH_DEFAULT_GROUPS'=''
  -e 'REMOTE_AUTH_DEFAULT_PERMISSIONS'=''
  -e 'PUID'='99'
  -e 'PGID'='100'
  -e 'UMASK'='022'
  -l net.unraid.docker.managed=dockerman
  -l net.unraid.docker.icon='https://raw.githubusercontent.com/linuxserver/docker-templates/master/linuxserver.io/img/netbox-logo.png'
  -p '8000:8000/tcp'
  -v '/mnt/user/appdata/netbox':'/config':'rw'
  --memory=4G 'lscr.io/linuxserver/netbox' && docker network connect proxy-net netbox && docker network connect netbox-db-net netbox

Container logs

NA

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