setting env in the push action

Author: JoeBeeContrast

.github/workflows/docker-release.yml

@@ -66,10 +66,15 @@ jobs:
 
       - name: Build and push Docker image (with signing)
         uses: docker/build-push-action@v4
+        env:
+          DOCKER_CONTENT_TRUST: 1
+          DOCKER_CONTENT_TRUST_REPOSITORY_PASSPHRASE: ${{secrets.DIGICERT_PKEY_PASSPHRASE}}
+          DOCKER_CONTENT_TRUST_KEY_FILENAME: ${{secrets.DIGICERT_PKEY_FILENAME}}
+          DOCKER_CONTENT_TRUST_PKEY_ROLE: ${{secrets.DIGICERT_PKEY_ROLE}}
         with:
           context: .
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
-          cache-to: type=gha,mode=max
+          cache-to: type=gha,mode=max