changed actions to only run build on tag

.gitea/workflows/build-deploy.yaml

@@ -0,0 +1,39 @@
+name: Arbeitszeitmessung Deploy
+run-name: ${{ gitea.actor }} is building and deploying arbeitszeitmesssung
+on:
+  push:
+    branches:
+      - "main"
+    tags:
+      - "*"
+  workflow_run:
+    workflows: [tests]
+    types:
+      - completed
+
+jobs:
+  build:
+    name: Build Go Image and Upload
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.letsstein.de
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: true
+          context: Backend
+          tags: |
+            git.letsstein.de/tom/arbeitszeitmessung:latest
+            git.letsstein.de/tom/arbeitszeitmessung:${{  github.ref_name }}