Github Actions: Publish first docker image

.gitea/workflows/build.yaml

@@ -0,0 +1,32 @@
+name: Build & Publish to GHCR
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+env:
+  GHCR_ORG: gansejunge
+  IMAGE_NAME: app-notifications-backend-push-notifications
+  IMAGE_PATH: ghcr.io/gansejunge/app-notifications-backend-push-notifications
+  OPS_ORG: notifier
+  OPS_REPO: ops-deployment
+  OPS_BRANCH_BASE: main
+  OPS_PATH: backend-push-notifications/deployment.yaml
+  GITEA_URL: https://git.gansejunge.com
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Log in to GHCR
+        run: echo "${{ secrets.GHCR_TOKEN }}" | docker login ghcr.io -u ${{ secrets.GHCR_USERNAME }} --password-stdin
+
+      - name: Build and Push Docker Image
+        run: |
+          docker build -t ghcr.io/gansejunge/${{ env.IMAGE_NAME }}:1 .
+          docker push ghcr.io/gansejunge/${{ env.IMAGE_NAME }}:1