GetContainerSpec construct container spec based on option provided.

WithCommand - container startup command.

WithEnv attach env variables.

WithEnvFromSecretorCM attach secret/cm as env.

WithImagePullPolicy - image pull policy.

WithName - name of the container.

WithPort appends the container port.

WithResources - container resource constraints.

WithSecurityContext attached pod security policy.

WithVolumeMounts mount cm/secret as volume.

CM_MISSING - error message to indicate CM is missing.

INVALID_ENV_FROM_TYPE - error message to indicate invalid type to mount as env.

SECRET_MISSING - error message to indicate Secret is missing.