Add auto-update trigger

Signed-off-by: Knut Ahlers <knut@ahlers.me>

Makefile

@@ -20,7 +20,7 @@ official-tests: build
 
 test: hadolint official-tests
 
-update: teamspeak_version_update test tag
+update: teamspeak_version_update test
 
 teamspeak_version_update:
 	docker run --rm -i \

update-version.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+set -euo pipefail
+
+### ---- ###
+
+echo "Switch back to master"
+git checkout master
+git reset --hard origin/master
+
+### ---- ###
+
+echo "Excuting update"
+make update
+
+echo "Checking for changes..."
+git diff --exit-code && exit 0
+
+echo "Updating repository..."
+make tag
+
+git push -q https://${GH_USER}:${GH_TOKEN}@github.com/luzifer-docker/vault.git master --tags