Installing dependencies.

node_modules/npm/lib/utils/ping.js

@@ -0,0 +1,7 @@
+// ping the npm registry
+// used by the ping and doctor commands
+const fetch = require('npm-registry-fetch')
+module.exports = async (flatOptions) => {
+  const res = await fetch('/-/ping?write=true', flatOptions)
+  return res.json().catch(() => ({}))
+}