Add comment specfying how to override the Redis image

charts/funkwhale/values.yaml

@@ -51,6 +51,13 @@ redis:
   # this to false and adjust the host to use your existing service.
   enabled: true
 
+  # If you wan to run Redis on a Raspbery Pi or another ARM-based
+  # system, use the official Docker image instead of the Bitnami one
+  # as the Bitnami images are only available as amd64.
+  # image:
+  #   repository: redis
+  #   tag: 6.0.12
+
   host: ''
   redisPort: 6379
   password: funkwhale