RUN echo "=== YARN INSTALL ==="; "$YARN" install --immutable  >/tmp/yarn.install.log.txt 2>&1
RUN echo "=== YARN BUILD ==="; "$YARN" build --filter=backend  >/tmp/yarn.build.log.txt 2>&1
RUN echo "=== EXPORT DYNAMIC PLUGINS (with --no-install) ==="; "$YARN" export-dynamic --filter=./dynamic-plugins/wrappers/*; \
  for d in $(find . -name yarn-install.log); do echo; echo "===== EXPORT DYNAMIC PLUGINS: $d =====>"; cat ${d}; echo "<===== EXPORT DYNAMIC PLUGINS: $d ====="; done; 
RUN echo "=== DIST-DYNAMIC YARN INSTALLS ==="; for f in $(find ./dynamic-plugins/wrappers/ -maxdepth 2 -type d -name dist-dynamic); do g=${f#*/wrappers/}; echo " > $g"; g=${g//\//_}; \
  pushd $f >/dev/null; "$YARN" install --immutable >"/tmp/yarn.install.${g}.log.txt" 2>&1; popd >/dev/null; done
...
# dump console logs if they have errors
RUN hadFail=0; for d in $(find /tmp -name "yarn*log*" || true) $(find /tmp/xfs-*  -name build.log || true); do \
failsCheck="$(grep -E "Failed with errors|Failed to execute command|Failed to install|Failed to download|exit code 1" "$d")"; \
if [[ $failsCheck != "" ]]; then \
  echo "==== $d SUMMARY ===="; echo "$failsCheck"; \
  echo "==== $d FULL ====";    cat "$d"; echo "==== $d ===="; \
  (( hadFail = hadFail +1 )); \
fi; \
done; if [[ $hadFail -gt 0 ]]; then exit $hadFail; fi