build: just opencv with ffmpeg

Signed-off-by: deadprogram <[email protected]>

.github/workflows/docker-alpine-ffmpeg.yml

@@ -0,0 +1,59 @@
+# This is the Github action to build and push the gocv/opencv Docker images.
+#
+name: Docker
+on:
+  push:
+    branches: [build-opencv-alpine, alpine-static-ffmpeg]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  opencv-ffmpeg:
+    name: opencv
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Check out the repo
+        uses: actions/checkout@v4
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            gocv/opencv:4.10.0-alpine-ffmpeg
+            ghcr.io/${{ github.repository_owner }}/opencv:4.10.0-alpine-ffmpeg
+          tags: |
+            type=sha,format=long
+            type=raw,value=latest
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+      - name: Log in to Github Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          file: Dockerfile.opencv-static-alpine-ffmpeg
+          platforms: linux/amd64,linux/arm64
+          context: .
+          push: true
+          tags: |
+            gocv/opencv:4.10.0-alpine-ffmpeg
+            ghcr.io/${{ github.repository_owner }}/opencv:4.10.0-alpine-ffmpeg
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max