feat: Add graceful shutdown #39

Job	Run time
Detect relevant changed files	6s
Build/Publish amd64 Image	6m 35s
Run cargo-udeps	2m 5s
Build/Publish arm64 Image	5m 46s
Package/Publish 0.0.0-pr396 Helm Chart	29s
Publish/Sign 0.0.0-pr396 Index	30s
Run OpenShift Preflight Check for 0.0.0-pr396-arm64	14s
Run OpenShift Preflight Check for 0.0.0-pr396-amd64	19s
Failure Notification	0s
Finished Build and Publish	3s
	16m 7s

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