feat: Add graceful shutdown #53

Job	Run time
Detect relevant changed files	8s
Build/Publish arm64 Image	5m 49s
Run cargo-udeps	2m 6s
Build/Publish amd64 Image	6m 42s
Publish/Sign 0.0.0-pr1004 Index	25s
Package/Publish 0.0.0-pr1004 Helm Chart	30s
Run OpenShift Preflight Check for 0.0.0-pr1004-arm64	14s
Run OpenShift Preflight Check for 0.0.0-pr1004-amd64	21s
Failure Notification	0s
Finished Build and Publish	3s
	16m 18s

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