Add Azure deployment examples and enhance configuration management

- Update .gitignore to exclude Terraform files
- Enhance README with Azure deployment instructions
- Refactor publish.sh to use a container for changelog parsing
- Add Azure example files including Terraform configurations
- Create cloud-init templates for PKI and default configurations
- Implement workload VM setup for testing routing

debian-package/publish.sh

@@ -1,8 +1,13 @@
 #!/bin/sh
 set -e
 
-VERSION="$(dpkg-parsechangelog --show-field Version -l debian/changelog)"
-PACKAGE="$(dpkg-parsechangelog --show-field Source -l debian/changelog)"
+changelog_field() {
+    container run --rm -v "$(pwd):/mnt" vpn-router-builder \
+        dpkg-parsechangelog --show-field "$1" -l /mnt/debian/changelog
+}
+
+VERSION="$(changelog_field Version)"
+PACKAGE="$(changelog_field Source)"
 DEB="out/${PACKAGE}_${VERSION}_all.deb"
 
 if [ ! -f "$DEB" ]; then