I am unable to upload a file through a deployment YAML in Kubernetes.
The deployment YAML

apiVersion: apps/v1
kind: Deployment
metadata:
  name: test
  labels:
    app: test
spec:
  replicas: 1
  selector:
    matchLabels:
      app: test
  template:
    metadata:
      labels:
        app: test
    spec:
      containers:
      - name: test
        image: openjdk:14
        ports:
        - containerPort: 8080
        volumeMounts: 
        - name: testing
          mountPath: "/usr/src/myapp/docker.jar"
        workingDir: "/usr/src/myapp"
        command: ["java"]
        args: ["-jar", "docker.jar"]        
      volumes: 
      - hostPath: 
          path: "C:\\Users\\user\\Desktop\\kubernetes\\docker.jar"
          type: File
        name: testing

I get the following error:

Events:
  Type     Reason     Age                From               Message
  ----     ------     ----               ----               -------
  Normal   Scheduled  19s                default-scheduler  Successfully assigned default/test-64fb7fbc75-mhnnj to minikube
  Normal   Pulled     13s (x3 over 15s)  kubelet            Container image "openjdk:14" already present on machine
  Warning  Failed     12s (x3 over 14s)  kubelet            Error: Error response from daemon: invalid mode: /usr/src/myapp/docker.jar

When I remove the volumeMount it runs with the error unable to access docker.jar.

        volumeMounts: 
        - name: testing
          mountPath: "/usr/src/myapp/docker.jar"