message: [ci] Add Docker builds
  This will start building our docker images.
diff: @@ -37,3 +37,7 @@ jobs:
  - run:
  name: Run All End to End Tests
  command: RUST_TEST_THREADS=2 cargo test --package testsuite
  + - run:
  + name: Build Docker Image
  + command: |
  + docker build -f docker/validator/validator.Dockerfile . --tag libra_e2e --build-arg GIT_REV="$(git rev-parse HEAD)" --build-arg GIT_UPSTREAM="$(git merge-base HEAD origin/master)" --build-arg BUILD_DATE="$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
  