webpack.config.js

const webpack = require('webpack');
const slsw = require('serverless-webpack');
const nodeExternals = require('webpack-node-externals');
const path = require('path')

module.exports = (async () => {
    const accountId = await slsw.lib.serverless.providers.aws.getAccountId();
    return {
        entry: slsw.lib.entries,
        target: 'node',
        devtool: 'source-map',
        externals: [nodeExternals({
            modulesDir: path.join(__dirname, './node_modules')
        })],
        mode: slsw.lib.webpack.isLocal ? 'development' : 'production',
        performance: {
            hints: false, // Turn off size warnings for entry points
        },
        stats: 'minimal', // https://github.com/serverless-heaven/serverless-webpack#stats
        plugins: [
            new webpack.DefinePlugin({
                AWS_ACCOUNT_ID: `${accountId}`,
            }),
        ],
        module: {
            rules: [
                {
                    test: /\.js$/,
                    use: ['babel-loader'],
                    include: __dirname,
                    exclude: /node_modules/,
                },
            ],
        },
    };
})();