Add container build workflow

.gitea/workflows/docker.yml

@@ -0,0 +1,58 @@
+name: Build Docker image
+run-name: ${{ gitea.actor }} is building a new image 🚀
+on:
+  # schedule:
+  #   - cron: "0 10 * * *"
+  push:
+    branches:
+      - "**"
+    tags:
+      - "v*.*.*"
+  pull_request:
+    branches:
+      - "main"
+
+jobs:
+  build:
+    runs-on: ubuntu-docker
+    steps:      
+      - name: echo job info
+        run: echo "🎉 This job was automatically triggered by a ${{ gitea.event_name }} event and running on a ${{ runner.os }} repo:branch:${{ gitea.repository }}:${{ gitea.ref }}."
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Generate image tags
+        # https://docs.docker.com/build/ci/github-actions/manage-tags-labels/
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            git.hollander.online/${{ gitea.repository_owner }}/${{ gitea.event.repository.name }}
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+      - name: Login to registry
+        if: gitea.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: git.hollander.online
+          username: ${{ gitea.repository_owner }}
+          password: ${{ secrets.CI_PACKAGES_RW }}
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: ${{ gitea.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/arm64,linux/amd64
+      - name: Cleanup old images
+        run: docker system prune -f