feat: Add graceful shutdown #121

Job	Run time
Detect relevant changed files	5s
Build/Publish amd64 Image	7m 34s
Run cargo-udeps	2m 23s
Build/Publish arm64 Image	5m 55s
Package/Publish 0.0.0-pr741 Helm Chart	31s
Publish/Sign 0.0.0-pr741 Index	34s
Run OpenShift Preflight Check for 0.0.0-pr741-amd64	18s
Run OpenShift Preflight Check for 0.0.0-pr741-arm64	17s
Failure Notification	0s
Finished Build and Publish	3s
	17m 40s

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