Make both _container.yml and _push_container.yml build and test container

Author: dan-fernandes

.github/workflows/_container.yml

@@ -36,9 +36,3 @@ jobs:
 
       - name: Test cli works in cached runtime image
         run: docker run --rm tag_for_testing --version
-      
-      - name: Upload container as artifact
-        uses: actions/upload-artifact@v4
-        with:
-          name: container
-          path: ${{ runner.temp }}/myimage.tar

.github/workflows/_push_container.yml

@@ -2,20 +2,41 @@ on:
   workflow_call:
 
 jobs:
-  push:
+  build:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Download container artifact
-        uses: actions/download-artifact@v4
+      - name: Checkout
+        uses: actions/checkout@v4
         with:
-          name: container
-          path: ${{ runner.temp }}
-      
-      - name: Load image
-        run: |
-          docker load --input ${{ runner.temp}}/myimage.tar
-          
+          # Need this to get version number from last tag
+          fetch-depth: 0
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Docker Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and export to Docker local cache
+        uses: docker/build-push-action@v6
+        env:
+          DOCKER_BUILD_RECORD_UPLOAD: false
+        with:
+          context: .
+          # Need load and tags so we can test it below
+          load: true
+          tags: tag_for_testing
+
+      - name: Test cli works in cached runtime image
+        run: docker run --rm tag_for_testing --version
+
       - name: Create tags for publishing image
         id: meta
         uses: docker/metadata-action@v5
@@ -33,6 +54,7 @@ jobs:
         # This does not build the image again, it will find the image in the
         # Docker cache and publish it
         with:
+          context: .
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}