message: Add git and dnsutil to dev Dockerfile
  With code consists of golang code, git is needed (will automatically
  pull go build from bazel so no need to install golang directly)
  The dnsutils is for testing prometheus+coredns
diff: @@ -2,10 +2,12 @@ FROM tensorflow/tensorflow:custom-op
  RUN apt-get update && \
  apt-get install -y \
  + git \
  curl \
  nano \
  unzip \
  - ffmpeg
  + ffmpeg \
  + dnsutils
  ARG BAZEL_VERSION=0.24.1
  ARG BAZEL_OS=linux
  