diff --git a/default.conf b/default.conf
new file mode 100644
index 0000000..1072e80
--- /dev/null
+++ b/default.conf
@@ -0,0 +1,44 @@
+server {
+    listen       80;
+    server_name  localhost;
+
+    #charset koi8-r;
+    #access_log  /var/log/nginx/log/host.access.log  main;
+
+    location / {
+        root   /data/www;
+        index  index.html index.htm;
+    }
+
+    #error_page  404              /404.html;
+
+    # redirect server error pages to the static page /50x.html
+    #
+    error_page   500 502 503 504  /50x.html;
+    location = /50x.html {
+        root   /data/www;
+    }
+
+    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
+    #
+    #location ~ \.php$ {
+    #    proxy_pass   http://127.0.0.1;
+    #}
+
+    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
+    #
+    #location ~ \.php$ {
+    #    root           html;
+    #    fastcgi_pass   127.0.0.1:9000;
+    #    fastcgi_index  index.php;
+    #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
+    #    include        fastcgi_params;
+    #}
+
+    # deny access to .htaccess files, if Apache's document root
+    # concurs with nginx's one
+    #
+    #location ~ /\.ht {
+    #    deny  all;
+    #}
+}
diff --git a/install/usr/share/swarmlab.io/sec/sec_bootstrap b/install/usr/share/swarmlab.io/sec/sec_bootstrap
index 1dd7c5a..e4ccb4d 100755
--- a/install/usr/share/swarmlab.io/sec/sec_bootstrap
+++ b/install/usr/share/swarmlab.io/sec/sec_bootstrap
@@ -46,26 +46,28 @@ case $ROLE in
         # Auto update default host file in background and dumb all output
         auto_update_hosts "${HOSTNAMES}" > /dev/null 2>&1 &
 
+                tail -f /dev/null
+
         # Start ssh server
-        /usr/sbin/sshd -D
+        #/usr/sbin/sshd -D
         ;;
 
 
     "workerservice")
 
         # Start ssh server in background
-        /usr/sbin/sshd -D &
+        #/usr/sbin/sshd -D &
 
         # Keep trying to connect to master node and stay there indefinitely so that master node can see
         # the connected hosts that are ready for MPI work
-        while sleep 1
-        do
+        #while sleep 1
+        #do
             # shellcheck disable=SC2086
-            ssh -T -o "StrictHostKeyChecking no"   \
-                -i "${USER_HOME}/.ssh/id_rsa"      \
-                ${USER}@${MPI_MASTER_SERVICE_NAME} \
-                "tail -f /dev/null"
-        done
+         #   ssh -T -o "StrictHostKeyChecking no"   \
+          #      -i "${USER_HOME}/.ssh/id_rsa"      \
+           #     ${USER}@${MPI_MASTER_SERVICE_NAME} \
+                tail -f /dev/null
+        #done
         ;;
     *)
         echo 'role argument only accepts "masterservice" or "workerservice"'
diff --git a/install/usr/share/swarmlab.io/sec/swarmlab-sec b/install/usr/share/swarmlab.io/sec/swarmlab-sec
index 4fea48d..1870742 100755
--- a/install/usr/share/swarmlab.io/sec/swarmlab-sec
+++ b/install/usr/share/swarmlab.io/sec/swarmlab-sec
@@ -465,9 +465,17 @@ up_master ()
     printf "\\n%s\\n" "$HEADER"
     echo "$ docker-compose up -d masterservice"
     printf "\\n"
-    docker-compose rm -f
-    docker-compose up --build -d masterservice
+ #   docker-compose rm -f
+ #   docker-compose up --build -d masterservice
     #docker-compose up   --force-recreate -d masterservice
+        docker-compose rm -f -s -v
+    docker pull $IMAGE_NAME
+    docker-compose up --build --remove-orphans  -d masterservice << ANSWERS
+yes
+yes
+yes
+ANSWERS
+
 }
 
 
@@ -646,7 +654,7 @@ if [ $COMMAND_UP -eq 1 ]; then
     generate_ssh_keys
     build_and_push_image	# remove for microservices
     up_master
-    up_workers
+    #up_workers
 
     prompt_ready
     show_instruction
@@ -667,7 +675,7 @@ elif [ $COMMAND_SCALE -eq 1 ]; then
     down_master
     down_workers
     up_master
-    up_workers
+    #up_workers
 
     prompt_ready
     show_instruction
@@ -678,7 +686,7 @@ elif [ $COMMAND_RELOAD -eq 1 ]; then
     down_workers
     build_and_push_image
     up_master
-    up_workers
+    #up_workers
 
     prompt_ready
     show_instruction