Added solution for day-1 - step-3-bonus

solution/day-1/step-3-bonus/bonus-3-hpa/hpa-deployment.yaml

solution/day-1/step-3-bonus/bonus-3-hpa/hpa-service.yaml

...onus/bonus-4-network-policy/networkPolicy-deployment.yaml

...-3-bonus/bonus-4-network-policy/networkPolicy-policy.yaml

solution/day-1/step-3-bonus/bonus-5-affinity/deployment.yaml

solution/day-1/step-3-bonus/bonus-6-daemonset/daemonset.yaml

.../step-3-bonus/bonus-7-deployment-strategy/deployment.yaml