NPM install and run errors

$cat /etc/centos-release > CentOS Linux release 7.7.1908 (Core)
$php -v > PHP 7.2.25 (cli) (built: Nov 20 2019 17:44:37) ( NTS )
$composer -V > Composer version 1.9.1 2019-11-01 17:20:17
$node -v > v12.13.1
$npm -v > 6.12.1
$drush status > Drupal version: 8.8.0, Drush version: 8.3.0
$drush pmi radix > Extension: radix, Version: 8.x-4.6

I am hoping someone could help identify what's wrong in here. getting error while executing npm install after creating sub-theme.

$ npm install

> my_radix@ postinstall /var/www/itam8/public_html/themes/my_radix
> find node_modules/ -name '*.info' -type f -delete

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.7 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.7: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

added 1316 packages from 550 contributors and audited 20465 packages in 39.319s
found 439 vulnerabilities (3 moderate, 436 high)
  run `npm audit fix` to fix them, or `npm audit` for details