message: ci: fix `hardhat-node` docker publish
  There was a bug in the config, the `file`
  was not relative to the `context`
diff: @@ -167,7 +167,7 @@ jobs:
  uses: docker/build-push-action@v2
  with:
  context: ./ops/docker/hardhat
  - file: ./Dockerfile
  + file: ./ops/docker/hardhat/Dockerfile
  push: true
  tags: ethereumoptimism/hardhat-node:${{ needs.canary-publish.outputs.canary-docker-tag }}
  