instruction: Create a Kubernetes configuration for declarative management of kubernetes objects using configuration files | kubernetes
output: ```text
  # last-applied-configuration value
   containers:
   - name: nginx
   image: nginx:1.16
   - name: nginx-helper-a # key: nginx-helper-a; will be deleted in result
   image: helper:1.3
   - name: nginx-helper-b # key: nginx-helper-b; will be retained
   image: helper:1.3
  
  # configuration file value
   containers:
   - name: nginx
   image: nginx:1.16
   - name: nginx-helper-b
   image: helper:1.3
   - name: nginx-helper-c # key: nginx-helper-c; will be added in result
   image: helper:1.3
  
  # live configuration
   containers:
   - name: nginx
   image: nginx:1.16
   - name: nginx-helper-a
   image: helper:1.3
   - name: nginx-helper-b
   image: helper:1.3
   args: ["run"] # Field will be retained
   - name: nginx-helper-d # key: nginx-helper-d; will be retained
   image: helper:1.3
  
  # result after merge
   containers:
   - name: nginx
   image: nginx:1.16
   # Element nginx-helper-a was deleted
   - name: nginx-helper-b
   image: helper:1.3
   args: ["run"] # Field was retained
   - name: nginx-helper-c # Element was added
   image: helper:1.3
   - name: nginx-helper-d # Element was ignored
   image: helper:1.3
  ```