[#61287] docker: Dockerfile.builder: Remove unnecessary files from bu…

…ild step

Signed-off-by: Illia Vysochyn <[email protected]>

docker/Dockerfile.builder

@@ -4,11 +4,23 @@
 # instead use etc/DockerHelper.sh
 ARG fromImage=openroad/flow-centos7-dev:latest
 
-FROM $fromImage
+FROM $fromImage AS OpenRoadBuilder
 
 ARG numThreads=$(nproc)
 
 COPY . /OpenROAD-flow-scripts
 WORKDIR /OpenROAD-flow-scripts
 
 RUN ./build_openroad.sh --no_init --local --threads ${numThreads}
+
+FROM $fromImage AS OpenRoadFlowScripts
+
+COPY . /OpenROAD-flow-scripts
+
+RUN rm -rf /OpenROAD-flow-scripts/tools
+
+COPY --from=OpenRoadBuilder /OpenROAD-flow-scripts/tools/install /OpenROAD-flow-scripts/tools/install
+
+FROM $fromImage
+
+COPY --from=OpenRoadFlowScripts /OpenROAD-flow-scripts /OpenROAD-flow-scripts