My usual ESLint config

Setup

$ npm i -D @frosas/eslint-config

Copy the project-specific files and edit them as needed:

$ cp -a node_modules/@frosas/eslint-config/project-files/. .

Integrate it into the project development workflow. For example, in your package.json:

{
  "scripts": {
    "lint": "eslint .",
    "test": "npm run lint && ..."
  }
}