Allow disabling the default Redis installation when a custom one is specified.

charts/funkwhale/requirements.yaml

@@ -2,3 +2,4 @@ dependencies:
   - name: redis
     version: ~10.6.10
     repository: https://charts.bitnami.com/bitnami
+    condition: redis.internal.enabled

charts/funkwhale/values.yaml

@@ -47,6 +47,13 @@ database:
   database: funkwhale
 
 redis:
+  password: funkwhale
+  redisPort: 6379
+  host: {{ template "funkwhale.fullname" . }}-redis-master
+  # If you already have a Redis service you'd like to use, set
+  # this to false and adjust the host to use your existing service.
+  internal:
+    enabled: true
   cluster:
     enabled: false
   master:
@@ -55,9 +62,6 @@ redis:
   slave:
     persistence:
       enabled: false
-  password: funkwhale
-  redisPort: 6379
-  host: {{ template "funkwhale.fullname" . }}-redis-master
 
 djangoSecret: ''