do not try to install any npm packages globally as root

common/configure_fresh_system.sh

@@ -195,9 +195,10 @@ if [[ -z $NO_GO ]]; then
     go get -u github.com/exercism/cli/exercism
 fi
 
-$SUDO npm install -g reveal-md
-$SUDO npm install -g diff-so-fancy
-$SUDO npm install -g cssnano
+nvm use node
+npm install -g reveal-md
+npm install -g diff-so-fancy
+npm install -g cssnano
 
 if [[ -z $NOPYTHON3 ]]; then
     set +e