Update cheatsheets

tldr/npm-install-ci-test

@@ -0,0 +1,18 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# npm install-ci-test
+
+> Install project dependencies and run tests in a single command, mainly used in continuous integration (CI) environments.
+> Equivalent to running `npm ci && npm test`.
+> More information: <https://docs.npmjs.com/cli/install-ci-test>.
+
+- Install dependencies and run tests:
+
+`npm {{[cit|install-ci-test]}}`
+
+- Display detailed logs during installation and testing:
+
+`npm {{[cit|install-ci-test]}} --verbose`