CI: Add automatic docker build on push and daily (#1)

- Automatically builds and publishes docker images on push
- Automatically re-builds images daily to ensure they are up to date with the upstream image

Reviewed-on: #1
Co-authored-by: Lucas Petrino <nsx1lucas@gmail.com>
Co-committed-by: Lucas Petrino <nsx1lucas@gmail.com>

.gitea/workflows/docker.yml

@@ -0,0 +1,79 @@
+name: Docker
+
+on:
+  push:
+    branches: [ "*" ]
+    tags: [ 'v*.*.*' ]
+  schedule:
+    - cron: "0 0 * * *"
+
+env:
+  REGISTRY: git.119.224.65.18.sslip.io
+
+jobs:
+  build:
+
+    runs-on: ubuntu-22.04
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - dockerfile: ./images/qt.dockerfile
+            image: git.119.224.65.18.sslip.io/siteorg/action-image-qt
+            base: ubuntu-22.04
+          - dockerfile: ./images/qt.dockerfile
+            image: git.119.224.65.18.sslip.io/siteorg/action-image-qt
+            base: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Install the cosign tool except on PR
+      # https://github.com/sigstore/cosign-installer
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@4959ce089c160fddf62f7b42464195ba1a56d382 # v3.6.0
+        with:
+          cosign-release: 'v2.2.4'
+
+      # Set up BuildKit Docker container builder to be able to build
+      # multi-platform images and export cache
+      # https://github.com/docker/setup-buildx-action
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
+        with:
+          driver-opts: network=host
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
+        with:
+          images: ${{ matrix.image }}-${{ matrix.base }}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@5cd11c3a4ced054e52742c5fd54dca954e0edd85 # v6.7.0
+        with:
+          context: .
+          file: ${{ matrix.dockerfile }}
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max