why i cannot run npm install && npm run dev?

Question

npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@~2.3.2 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.3.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN sass-loader@11.1.1 requires a peer of fibers@>= 3.1.0 but none is installed. You must install peer dependencies yourself.
npm WARN sass-loader@11.1.1 requires a peer of node-sass@^4.0.0 || ^5.0.0 || ^6.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN postcss-load-config@3.1.1 requires a peer of ts-node@>=9.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN webpack-notifier@1.15.0 requires a peer of @types/webpack@>4.41.31 but none is installed. You must install peer dependencies yourself.
npm WARN ws@8.4.0 requires a peer of bufferutil@^4.0.1 but none is installed.

Answer 1

Martin Taylor Chokidar is a library that abstracts away a lot of OS-specific file-system stuff. The chokidar dependency you are referring to is optional—I'd assume fsevents will be installed on some platforms but not others.

Answer 2

Try installing the dependencies it complains about manually.

npm i --save-dev fibers
npm i --save-dev node-sass
npm i --save-dev ts-node
npm i --save-dev @types/webpack
npm i --save-dev bufferutil

and so on.