use GitHub Actions to build the interop runner Docker image

.circleci/config.yml

@@ -5,11 +5,6 @@ executors:
       - image: "circleci/golang:1.14"
     environment:
       runrace: true
-  interop:
-    docker:
-      - image: circleci/buildpack-deps:stretch
-    environment:
-      IMAGE_NAME: martenseemann/quic-go-interop
 
 jobs:
   "test": &test
@@ -45,49 +40,8 @@ jobs:
           command: ginkgo -v -randomizeAllSpecs -trace integrationtests/self -- -qlog -metrics
   go114:
     <<: *test
-  interop-build:
-    executor: interop
-    steps:
-      - checkout
-      - setup_remote_docker:
-          docker_layer_caching: true
-      - run:
-          name: Build docker image
-          command: cd interop && docker build . -t $IMAGE_NAME:latest --pull --build-arg CACHEBUST=$(date +%s)
-      - run:
-          name: Archive Docker image
-          command: docker save -o image.tar $IMAGE_NAME
-      - persist_to_workspace:
-          root: .
-          paths:
-            - ./image.tar
-  interop-publish:
-    executor: interop
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - setup_remote_docker
-      - run:
-          name: Load archived Docker image 
-          command: docker load -i /tmp/workspace/image.tar
-      - run:
-          name: Publish quic-go-interop
-          command: |
-            echo "$DOCKERHUB_PASS" | docker login -u "$DOCKERHUB_USERNAME" --password-stdin
-            docker push $IMAGE_NAME:latest
 
 workflows:
   workflow:
     jobs:
       - go114
-      - interop-build:
-          filters:
-            branches:
-              only: interop
-      - interop-publish:
-          requires:
-            - go114
-            - interop-build
-          filters:
-            branches:
-              only: interop