add automatic build and release of the container image

Signed-off-by: Alexander <mrmoor4@googlemail.com>

.github/workflows/action.yml

@@ -0,0 +1,38 @@
+jobs:
+  push-container-image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: 'arm64'
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Github Packages
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build image and push to Docker Hub and GitHub Container Registry
+        uses: docker/build-push-action@v2
+        with:
+          # relative path to the place where source code with Dockerfile is located
+          context: .
+          file: {context}/APTnotes_async_dockerfile.Dockerfile
+          # Note: tags has to be all lower-case
+          tags: |
+            ghcr.io/schwankner/APTnotes-tools:latest
+          # build on feature branches, push only on main branch
+          push: ${{ github.ref == 'refs/heads/master' }}
+          platforms: linux/amd64,linux/arm64
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}

README.md

@@ -4,12 +4,16 @@ Updated to Python 3.12 with updated dependencies as of Jan 12 2024.
 Synchronous and asynchronous downloads are available, but the async is strongly recommended, because it's way faster.
 
 ### Docker image
+You can use prebuild Docker images from the registry or build them on your machine.
+The Docker images are build for amd64 and arm64. Docker will download the correct image automatically.
+Only the async Docker image is available from the registry, because it's mainly used.
 #### Usage
 
-    docker run --mount type=bind,source="$(pwd)"/reports,target=/usr/src/app/reports localhost/aptnotes/tools-async
+    docker run --mount type=bind,source="$(pwd)"/reports,target=/usr/src/app/reports ghcr.io/schwankner/APTnotes-tools
 
 This mounts the reports folder in the container and downloads all the reports to it.
 #### Build
+There are two Dockerfiles, one for sync and another for async download of the reports. Use the one which fits for you.
 
     docker build -f APTnotes_async_dockerfile.Dockerfile . -t aptnotes/tools-async:latest