@mhy/config/webpack/production/module/rules/eslint.js

> This documentation is not complete. It's in progress and it's a BETA version. Use the tool at your own risk.

module.exports.default = rules => {
    const rule = rules.find(({ loader = '' }) =>
        loader.includes('eslint-loader')
    )
    rule.options = {
        ...rule.options,
        failOnWarning: true,
        failOnError: true
    }
    return rules
}