fix: Update webhook handler to skip Docker commands and map environment names

- Remove Docker pull step (Knative handles image pulling)
- Add environment name mapping (development -> dev, production -> prod)
- Add test files to .gitignore to exclude PII
- Webhook signature validation now working correctly

.gitignore

@@ -33,6 +33,10 @@ Thumbs.db
 .env.production
 webhook_secret.txt
 
+# Test files with PII
+test-signature.py
+test-webhook.sh
+
 # Personal deployment files
 manifests/personal/
 config/personal/