func NewMapStore() *MapStore {
	return &MapStore{puppies: map[uint16]puppy.Puppy{}}
}
NewMapStore creates a new in-memory store with map intialised
package store
import (
	puppy "github.com/anz-bank/go-course/08_project/runnerdave/pkg/puppy"
)
type MapStore struct {
	puppies map[uint16]puppy.Puppy
}