alpine: add latest-update option

alpine/init.sh

@@ -10,6 +10,7 @@ showHelp() {
 }
 
 main() {
+	APKLatestStable
 	APKUpdateDist
 	APKInstallBase
 	Customizations
@@ -17,6 +18,12 @@ main() {
 	Reboot
 }
 
+APKLatestStable() {
+	if whiptail --yesno "Use latest-stable repos ?" 0 0 3>&1 1>&2 2>&3; then
+		CURVER=$(cat /etc/os-release | grep "PRETTY_NAME" | grep 'Alpine Linux ' | awk -F'Alpine Linux ' '{print $2}' | awk -F'"' '{print $1}')
+		sed -i 's/'"${CURVER}"'/latest-stable/' /etc/apk/repositories
+	fi
+}
 APKUpdateDist() {
 	apk update
 	apk upgrade