feat: Add graceful shutdown #80

Job	Run time
Detect relevant changed files	8s
Run cargo-udeps	2m 0s
Build/Publish amd64 Image	6m 35s
Build/Publish arm64 Image	6m 36s
Publish/Sign 0.0.0-pr670 Index	35s
Package/Publish 0.0.0-pr670 Helm Chart	35s
Run OpenShift Preflight Check for 0.0.0-pr670-arm64	16s
Run OpenShift Preflight Check for 0.0.0-pr670-amd64	19s
Failure Notification	-1s
Finished Build and Publish	4s
	17m 7s

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