Handle image install of global node modules directory

src/freedombone-utils-nodejs

 }
 
 function nodejs_setup_global_modules {
-    if [ ! -d /root/.npm-global ]; then
-        mkdir /root/.npm-global
+    if [ ! -d "$rootdir/root/.npm-global" ]; then
+        mkdir "$rootdir/root/.npm-global"
     fi
-    npm config set prefix '/root/.npm-global'
-    export PATH=/root/.npm-global/bin:$PATH
-    if ! grep -q "PATH=/root/.npm-global/bin" /root/.bashrc; then
-        echo "PATH=/root/.npm-global/bin:\$PATH" >> /root/.bashrc
+    $mesh_install_nodejs_prefix npm config set prefix '/root/.npm-global'
+    if ! grep -q "PATH=/root/.npm-global/bin" "$rootdir/root/.bashrc"; then
+        echo "PATH=/root/.npm-global/bin:\$PATH" >> "$rootdir/root/.bashrc"
     fi
-    if ! grep -q "NPM_CONFIG_PREFIX=" /root/.bashrc; then
-        echo "export NPM_CONFIG_PREFIX=/root/.npm-global" >> /root/.bashrc
+    if ! grep -q "NPM_CONFIG_PREFIX=" "$rootdir/root/.bashrc"; then
+        echo "export NPM_CONFIG_PREFIX=/root/.npm-global" >> "$rootdir/root/.bashrc"
+    fi
+    if [ ! "$rootdir" ]; then
+        export PATH=/root/.npm-global/bin:$PATH
+        export NPM_CONFIG_PREFIX=/root/.npm-global
     fi
-    export NPM_CONFIG_PREFIX=/root/.npm-global
 }
 
 function remove_nodejs {