diff --git a/docker/frontend/Dockerfile b/docker/frontend/Dockerfile
index 6f664a6f2..61a6eba6e 100644
--- a/docker/frontend/Dockerfile
+++ b/docker/frontend/Dockerfile
@@ -14,9 +14,12 @@ ENV CHROME_BIN=chromium
 RUN npm install -g n
 RUN n 20.17.0
 
+# locally these two should be identical, so that compilation results are written out into the file dir.
+# in CI-pipelines these two should be different, so that the container caches the compilation results.
+ARG MOUNT_DIR=/bindmount/fradrive
 ARG PROJECT_DIR=/fradrive
 RUN mkdir -p ${PROJECT_DIR}
-RUN cp -r /tmp${PROJECT_DIR}/* ${PROJECT_DIR}
+RUN if [ "${PROJECT_DIR}" != "${MOUNT_DIR}"]; then cp -r ${MOUNT_DIR}/* ${PROJECT_DIR} ; fi
 WORKDIR ${PROJECT_DIR}
 ENV HOME=${PROJECT_DIR}
 
@@ -24,4 +27,4 @@ RUN make node_modules
 RUN make well-known
 
 ENV FRADRIVE_MAKE_TARGET=frontend-watch
-ENTRYPOINT make -- ${FRADRIVE_MAKE_TARGET} CHROME_BIN=${CHROME_BIN}
\ No newline at end of file
+ENTRYPOINT make -- ${FRADRIVE_MAKE_TARGET} CHROME_BIN=${CHROME_BIN}