feat: Add graceful shutdown #99

Job	Run time
Detect relevant changed files	5s
Run cargo-udeps	2m 8s
Build/Publish arm64 Image	6m 3s
Build/Publish amd64 Image	6m 26s
Package/Publish 0.0.0-pr894 Helm Chart	25s
Publish/Sign 0.0.0-pr894 Index	26s
Run OpenShift Preflight Check for 0.0.0-pr894-arm64	17s
Run OpenShift Preflight Check for 0.0.0-pr894-amd64	21s
Failure Notification	-1s
Finished Build and Publish	2s
	16m 12s

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