Push docker (#18)

* update docker action : push on ghcr

.github/workflows/cicd_docker.yml

@@ -1,13 +1,20 @@
 name: cicd_docker
 
 on:
-  # Run tests for non-draft pull request on main
+  push:
+    branches: [ "main" ]
+    tags: [ 'v*.*.*' ]
   pull_request:
-    branches:
-      - main
+    branches: [ "main" ]
+
+permissions:
+  packages: write
 
 env:
+  IMAGE_NAME: ${{ github.repository }}
+  REGISTRY: ghcr.io
   DOCKER_IMAGE_NAME: pdal_ign_plugin
+  TEST_TAG: pdal_ign_plugin:test
 
 jobs:
   build_docker_image_and_run_tests:
@@ -18,10 +25,45 @@ jobs:
     - name: Checkout branch
       uses: actions/checkout@v4
 
-    - name: Build docker image
-      run: docker build -t ${{ env.DOCKER_IMAGE_NAME }}:test .
+    # build the image
+    - name: Build and push Docker image
+      id: build
+      uses: docker/build-push-action@v5
+      with:
+        load: true
+        tags: ${{ env.TEST_TAG }}
 
+    # run the test on the docker build
     - name: Run tests in docker image
-      run: docker run ${{ env.DOCKER_IMAGE_NAME }}:test python -m pytest
+      run: docker run ${{ env.TEST_TAG }} python -m pytest
+
+    # 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@v2
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
 
+    # Extract metadata (tags, labels) for Docker
+    # https://github.com/docker/metadata-action
+    - name: Extract Docker metadata
+      if: github.event_name != 'pull_request'
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
+    # Build and push Docker image with Buildx (don't on PR)
+    # https://github.com/docker/build-push-action
+    - name: Build and push Docker image
+      id: build-and-push
+      if: ${{ github.event_name != 'pull_request' }}
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}