add publish image github action

Author: tgvashworth

.github/workflows/docker-cloud-publish.yml

@@ -0,0 +1,24 @@
+name: docker-cloud go publish
+on: push
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: docker-cloud
+    steps:
+      - uses: actions/checkout@v3
+      - name: Login to Amazon ECR Public
+        id: login-ecr-public
+        uses: aws-actions/amazon-ecr-login@v1
+        with:
+          registry-type: public
+      - name: Build, tag, and push docker image to Amazon ECR Public
+        env:
+          REGISTRY: ${{ steps.login-ecr-public.outputs.registry }}
+          REGISTRY_ALIAS: w0k4j6h5
+          REPOSITORY: immersive-go-course/docker-cloud
+          IMAGE_TAG: ${{ github.sha }}
+        run: |
+          docker build -t $REGISTRY/$REGISTRY_ALIAS/$REPOSITORY:$IMAGE_TAG .
+          docker push $REGISTRY/$REGISTRY_ALIAS/$REPOSITORY:$IMAGE_TAG