feat: Add graceful shutdown #64

Job	Run time
Detect relevant changed files	6s
Build/Publish amd64 Image	6m 25s
Build/Publish arm64 Image	5m 49s
Run cargo-udeps	1m 51s
Package/Publish 0.0.0-pr747 Helm Chart	26s
Publish/Sign 0.0.0-pr747 Index	34s
Run OpenShift Preflight Check for 0.0.0-pr747-amd64	17s
Run OpenShift Preflight Check for 0.0.0-pr747-arm64	18s
Failure Notification	-1s
Finished Build and Publish	3s
	15m 48s

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