My standard ESLint config

.eslintrc.json

{
    "parserOptions": {
        "ecmaVersion": 8
    },
    "env": {
        "es6": true,
        "node": true
    },
    "extends": ["eslint:recommended", "google"],
    "rules": {
        "indent": ["error", 4],
        "quotes": ["error", "double"],
        "semi": ["error", "always"],
        "linebreak-style": "off", // git handles this
        "eqeqeq": "error",
        "comma-dangle": "off",
        "one-var": ["error", {"initialized": "never", "uninitialized": "always"}],
        "max-len": "off",
        "require-await": "error",
        "no-console": "off",
        "new-cap": ["error", {"capIsNewExceptionPattern": "express\\.Router"}] // express
    }
}