✨ Use a default Redis password

Although it does not provide any additional security, it shows how to
configure Redis with a password and how to use Netbox using a password
protected redis server. Something that might be considered in a classic
production deployment. (But is mostly irrelevant in e.g. a Kubernetes /
OpenShift deployment as the isolation is usually on a network level.)

docker-compose.yml

@@ -45,7 +45,11 @@ services:
     - netbox-postgres-data:/var/lib/postgresql/data
   redis:
     image: redis:4-alpine
-    command: redis-server --appendonly yes
+    command:
+    - sh
+    - -c # this is to evaluate the $REDIS_PASSWORD from the env
+    - redis-server --appendonly yes --requirepass $$REDIS_PASSWORD ## $$ because of docker-compose
+    env_file: redis.env
     volumes:
     - netbox-redis-data:/data
 volumes: