feat: Add graceful shutdown #79

Job	Run time
Detect relevant changed files	7s
Run cargo-udeps	1m 54s
Build/Publish arm64 Image	6m 2s
Build/Publish amd64 Image	6m 38s
Publish/Sign 0.0.0-pr670 Index	32s
Package/Publish 0.0.0-pr670 Helm Chart	30s
Run OpenShift Preflight Check for 0.0.0-pr670-amd64	21s
Run OpenShift Preflight Check for 0.0.0-pr670-arm64	18s
Failure Notification	0s
Finished Build and Publish	4s
	16m 26s

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