message: Added comment for uppercase proxies per code review
diff: @@ -86,6 +86,8 @@ function build_container()
  TF_DOCKER_BUILD_ARGS+=("--build-arg https_proxy=${https_proxy}")
  TF_DOCKER_BUILD_ARGS+=("--build-arg socks_proxy=${socks_proxy}")
  TF_DOCKER_BUILD_ARGS+=("--build-arg no_proxy=${no_proxy}")
  + # In general having uppercase proxies is a good idea because different
  + # applications running inside Docker may only honor uppercase proxies
  TF_DOCKER_BUILD_ARGS+=("--build-arg HTTP_PROXY=${HTTP_PROXY}")
  TF_DOCKER_BUILD_ARGS+=("--build-arg HTTPS_PROXY=${HTTPS_PROXY}")
  TF_DOCKER_BUILD_ARGS+=("--build-arg SOCKS_PROXY=${SOCKS_PROXY}")
  