feat: Add graceful shutdown #120

Job	Run time
Detect relevant changed files	8s
Run cargo-udeps	2m 5s
Build/Publish arm64 Image	6m 1s
Build/Publish amd64 Image	7m 27s
Publish/Sign 0.0.0-pr741 Index	27s
Package/Publish 0.0.0-pr741 Helm Chart	25s
Run OpenShift Preflight Check for 0.0.0-pr741-arm64	20s
Run OpenShift Preflight Check for 0.0.0-pr741-amd64	21s
Failure Notification	-1s
Finished Build and Publish	3s
	17m 16s

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