feat: Add graceful shutdown #71

Job	Run time
Detect relevant changed files	7s
Build/Publish amd64 Image	7m 21s
Build/Publish arm64 Image	6m 14s
Run cargo-udeps	2m 11s
Package/Publish 0.0.0-pr804 Helm Chart	24s
Publish/Sign 0.0.0-pr804 Index	26s
Run OpenShift Preflight Check for 0.0.0-pr804-amd64	23s
Run OpenShift Preflight Check for 0.0.0-pr804-arm64	18s
Failure Notification	0s
Finished Build and Publish	2s
	17m 26s

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