Introduce Bazel build image without cache

The Bazel cache warm-up has a massive impact on the Docker image
size (around 3.5Gb) which could impair the build of other derived
images like the gerrit release.

Breaking down the Bazel image into two separate layers allows
to keep a full-cached image for CI builds and remove lots of GBs
from the gerrit release.

Change-Id: Ibc38e512d425f8b9b83145a7784553d7e035eaf7
5 files changed
tree: a058afeefe95bb5f0d6d1e03baebe05a30529d5f
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore