npm-ping: add page (#19055)

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Dylan <145150333+dmmqz@users.noreply.github.com>

Author: 3 people

pages/common/npm-ping.md

@@ -0,0 +1,12 @@
+# npm ping
+
+> Ping `npm` registry.
+> More information: <https://docs.npmjs.com/cli/npm-ping>.
+
+- Ping the default `npm` registry:
+
+`npm ping`
+
+- Ping custom `npm` registry:
+
+`npm ping --registry {{custom_registry_url}}`