use flag file .FLAG_HOME_INITIALIZED

Dockerfile

@@ -80,10 +80,9 @@ RUN --mount=from=qe_conda_env,source=${QE_DIR},target=${QE_DIR} \
     bash /usr/local/bin/before-notebook.d/42_setup-hq-computer.sh && \
     python -m aiidalab_qe install-qe --computer ${HQ_COMPUTER} && \
     python -m aiidalab_qe install-pseudos --source ${PSEUDO_FOLDER} && \
-    touch /home/${NB_USER}/work/.placeholder && \
     verdi daemon stop && \
     mamba run -n aiida-core-services pg_ctl stop && \
-    # touch /home/${NB_USER}/.FLAG_HOME_INITIALIZED && \
+    touch /home/${NB_USER}/.FLAG_HOME_INITIALIZED && \
     cd /home/${NB_USER} && tar -cf /opt/conda/home.tar .
 
 # STAGE 3 - Final stage

before-notebook.d/00_untar-home.sh

@@ -4,7 +4,7 @@ set -eux
 home="/home/${NB_USER}"
 
 # Untar home archive file to restore home directory if it is empty
-if [[ $(ls -A ${home} | wc -l) -le 1 ]]; then
+if [ ! -e $home/.FLAG_HOME_INITIALIZED ]; then
   if [[ ! -f $HOME_TAR ]]; then
     echo "File $HOME_TAR does not exist!"
     exit 1