add docker buildkit

.github/workflows/build-dev-cli.yaml

@@ -23,7 +23,7 @@ jobs:
           aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws/o1j4x7p4
       - name: Build
         run: |
-          docker build . \
+          DOCKER_BUILDKIT=1 docker build . \
             -t public.ecr.aws/o1j4x7p4/porter-cli:dev \
             -f ./services/porter_cli_container/dev.Dockerfile
       - name: Push