Added push on tag GH action

.github/workflows/moodletools-build-and-push-on-tag.yaml

@@ -0,0 +1,33 @@
+---
+name: Build and push Docker Image on Tag
+
+on:
+  push:
+    tags:
+      - 'moodle-tools-[0-9]+.[0-9]+.[0-9]+*'
+jobs:
+  pre_build:
+    runs-on: ubuntu-latest
+    outputs:
+      tag: ${{ steps.tag.outputs.tag }}
+      suffix: ${{ steps.tag.outputs.suffix }}
+    steps:
+      - name: Filter Tag name
+        uses: olegtarasov/[email protected]
+        id: tag
+        with:
+          tagRegex: "(?<tag>[0-9]+.[0-9]+.[0-9]+)(?<suffix>-.*)"
+  build_and_push:
+    permissions:
+      packages: write
+      security-events: write
+      actions: read
+      contents: read
+    needs: pre_build
+    uses: hpi-schul-cloud/infra-tools/.github/workflows/build-and-push.yaml@master
+    with:
+      registry: ghcr.io
+      image: dbildungsplattform/moodle-tools
+      tag: ${{ needs.pre_build.outputs.tag }}
+      image_name: "moodle-tools"
+      context: "./moodle-tools/"