message: [docker] Add config-builder to validator image
  Some pre-mainnet partners want to run their validator without an
  initContainer to do the configuration. Include the (stripped)
  config-builder to support this use case.
  Closes:
  Approved by: sherry-x
diff: @@ -17,6 +17,7 @@ FROM toolchain AS builder
  COPY . /libra
  RUN cargo build --release -p libra-node -p cli -p config-builder && cd target/release && rm -r build deps incremental
  +RUN strip /libra/target/release/config-builder
  ### Production Image ###
  FROM debian:buster AS prod
  @@ -26,6 +27,7 @@ RUN addgroup --system --gid 6180 libra && adduser --system --ingroup libra --no-
  RUN mkdir -p /opt/libra/bin /opt/libra/etc
  COPY docker/install-tools.sh /root
  COPY --from=builder /libra/target/release/libra-node /opt/libra/bin
  +COPY --from=builder /libra/target/release/config-builder /opt/libra/bin
  # Admission control
  EXPOSE 8000
  