diff --git a/Dockerfile b/Dockerfile
index 1976382..447a3b4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,7 @@ LABEL MAINTAINERS="Guillaume Scheibel <guillaume.scheibel@gmail.com>, Damien DUP
 # build/llo-base-images/asciidoctor-alpine/docker-asciidoctor
 RUN apk add --no-cache \
     bash \
+    sudo \
     curl \
     ca-certificates \
     findutils \
diff --git a/startup.sh b/startup.sh
index d36bd48..dd90e4b 100644
--- a/startup.sh
+++ b/startup.sh
@@ -55,11 +55,14 @@ read -r -d '' VAR <<EOF
 if [ ! -d "$REPO" ] ; then
         cd /home/$USER
         git clone $GIT_TUTOR
+	chown -R $USER.$USER /home/$USER
+        
 else
         cd /home/$USER/$REPO
         git fetch origin master
         git reset --hard FETCH_HEAD
         git clean -df
+	chown -R $USER.$USER /home/$USER
 fi
 
  
@@ -75,12 +78,10 @@ chmod +x /home/$USER/crond/playground-sync.sh
 read -r -d '' VAR <<EOF
 #!/bin/bash
 
-cd /home/$USER/$REPO/swarmlab-app/src
-npm install;
-npm cache clean --force;
+sudo -H -u node /bin/bash -c 'cd /home/$USER/$REPO/swarmlab-app/src; npm install; npm cache clean --force;'
 
 EOF
-echo "$VAR" >  /home/$USER/crond/playground-sync.sh
+echo "$VAR" >  /home/$USER/crond/playground-npm-install.sh
 
 
 
@@ -138,7 +139,8 @@ chown -R $USER.$USER /home/$USER
 chmod -R 755 /home/$USER
 
 
-/home/$USER/crond/playground-start.sh
 /home/$USER/crond/playground-sync.sh
+sudo -H -u node bash /home/$USER/crond/playground-npm-install.sh
+/home/$USER/crond/playground-start.sh
 
 /usr/bin/supervisord -n -c /etc/supervisor/supervisord.conf