Change Project
Let’s make a simple change. We’ll adjust the number of replicas to 3.  We do this in deployment/dev.yaml.
.kubes/resources/web/deployment/dev.yaml
---
spec:
  replicas: 3 # <= CHANGED
This demonstrates Kubes Layering support. We can make changes to only the KUBES_DEV environment.
Next, we’ll deploy this update.