3rd fix DOCKERHUB_IMAGE_TAGS env in GitHub Actions workflow

.github/workflows/build-push.yml

@@ -29,7 +29,7 @@ jobs:
         password: ${{ secrets.DOCKERHUB_TOKEN }}
     - name: Set environment DOCKERHUB_IMAGE_TAGS on master
       if: github.ref == 'refs/heads/master' && matrix.base == 'alpine'
-      run: echo "DOCKERHUB_IMAGE_TAGS=$DOCKERHUB_REPOSITORY:latest" >> $GITHUB_ENV
+      run: echo "DOCKERHUB_IMAGE_TAGS=[$DOCKERHUB_REPOSITORY:latest]" >> $GITHUB_ENV
     - name: Set environment DOCKERHUB_IMAGE_TAGS
       if: github.ref != 'refs/heads/master'
       shell: bash
@@ -37,21 +37,18 @@ jobs:
         _BRANCH=${GITHUB_REF##*/}
         _VERSION=${_BRANCH#v*}
         _MAJOR_VERSION=${_VERSION%.*}
-
         _DOCKERHUB_IMAGE_TAGS="\"$DOCKERHUB_REPOSITORY:$_VERSION-${{ matrix.base }}\""
         _DOCKERHUB_IMAGE_TAGS+=", \"$DOCKERHUB_REPOSITORY:$_MAJOR_VERSION-${{ matrix.base }}\""
         _DOCKERHUB_IMAGE_TAGS+=", \"$DOCKERHUB_REPOSITORY:${{ matrix.base }}\""
-
         if [ "${{ matrix.base }}" == "alpine" ]; then
           _DOCKERHUB_IMAGE_TAGS+=", \"$DOCKERHUB_REPOSITORY:$_VERSION\""
           _DOCKERHUB_IMAGE_TAGS+=", \"$DOCKERHUB_REPOSITORY:$_MAJOR_VERSION\""
         fi
-
-        echo "DOCKERHUB_IMAGE_TAGS=$_DOCKERHUB_IMAGE_TAGS" >> $GITHUB_ENV
+        echo "DOCKERHUB_IMAGE_TAGS=[$_DOCKERHUB_IMAGE_TAGS]" >> $GITHUB_ENV
     - name: Build and push
       if: env.DOCKERHUB_IMAGE_TAGS != ''
       uses: docker/build-push-action@v2
       with:
         file: ${{ matrix.base }}/Dockerfile
-        tags: toJSON("[ ${{ env.DOCKERHUB_IMAGE_TAGS }} ]")
+        tags: ${{ fromJson(env.DOCKERHUB_IMAGE_TAGS) }}
         push: true