I am new to Kubernetes and trying my first deployment. Main Content of Docker file:

..........
..........
COPY . $PROJECT_HOME
WORKDIR $PROJECT_HOME
EXPOSE 9000
CMD ["sbt"]

I can successfully build the container image using the following command docker build -t fitmeold:0.3 .

To deploy the image on a container using docker I used the following command:

docker run  -it -p 80:9000 fitmeold:0.3 --name fitmeold sbt run

were as

1. -p for port forwarding because sbt will run the project default on 9000 port.

2. fitmeold:0.3 is my image name

3. sbt run to pass Command argument

Instead of the building through docker build, I want to use the Kubernetes to deploy the fitmeold:0.3 container with the replication factor. My YAML file looks like this:

---
apiVersion: "apps/v1"
kind: "Deployment"
metadata:
  name: "fitmeold"
  namespace: "default"
  labels:
    app: "fitmeold"
spec:
  replicas: 3
  selector:
    matchLabels:
      app: "fitmeold"
  template:
    metadata:
      labels:
        app: "fitmeold"
    spec:
      containers:
        - name: "fitmeold"
          image: "fitmeold:0.3"
          command:
            - "-p 80:8000 -it sbt run"
---
apiVersion: "autoscaling/v2beta1"
kind: "HorizontalPodAutoscaler"
metadata:
  name: "fitmeold-hpa"
  namespace: "default"
  labels:
    app: "fitmeold"
spec:
  scaleTargetRef:
    kind: "Deployment"
    name: "fitmeold"
    apiVersion: "apps/v1"
  minReplicas: 1
  maxReplicas: 5
  metrics:
    - type: "Resource"
      resource:
        name: "cpu"
        targetAverageUtilization: 80

Is this the right way to pass the command arguments through YAML file or is it equivalent to docker build command?

If that's correct why I am getting ImagePullBackOff as in status for each pods. I am not able to understand what I am doing wrong and how to pass the equivalent docker build command argument in YAML file.