Warnings while docker build

[bonjune]

Step 6/7 : RUN npm install

npm WARN deprecated [email protected]: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
npm WARN deprecated [email protected]: Switch to the `bfj` package for fixes and new features!
npm WARN deprecated [email protected]: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
npm WARN deprecated [email protected]: CircularJSON is in maintenance only, flatted is its successor.

> [email protected] postinstall /code/node_modules/webpack/node_modules/uglifyjs-webpack-plugin
> node lib/post_install.js

npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN [email protected] requires a peer of [email protected] but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})