webpack build failed - node.js

Question

I am building an app with react in the front end and nodejs on the backend . y react is packed by webpack and configure my server to run concurrently with the front end. For months, i have been building my app successfully, suddenly my build begins to fail throwing warnings like below followed by errors
WARNING in ./server/~/sequelize/lib/sequelize.js Critical
dependencies: 388:61-74 the request of a dependency is an expression
# ./server/~/sequelize/lib/sequelize.js 388:61-74
And errors like
ERROR in ./server/models/index.js Module not found: Error: Cannot
resolve module 'fs' in /PATH/static/server/models
My webpack used to be config like below
var path = require('path');
var webpack = require('webpack');
module.exports = {
entry: ['babel-polyfill', 'react-hot-loader/patch', path.normalize(__dirname + '/src/index')],
devtool: 'cheap-module-source-map',
devServer: {
hot: true
},
output: {
filename: 'bundle.js',
publicPath: '/',
path: path.join(__dirname, 'server')
},
module: {
loaders: [
{
loader: 'babel-loader',
test: /\.js$/,
exclude: /node_modules/
},
{
loader: 'style!css',
test: /\.css$/,
include: [path.resolve(__dirname, 'public', 'css')]
},
{
test: /\.json$/,
loader: "json-loader"
}
],
plugins: [
new webpack.NoErrorsPlugin(),
new webpack.DefinePlugin({
//'process.env.NODE_ENV': JSON.stringify('development')
}),
new webpack.NamedModulesPlugin(),
new webpack.HotModuleReplacementPlugin()
],
}
};
ANd my server config below
var webpack = require('webpack');
var config = require('./webpack.config');
var path = require('path');
var express = require('express');
var app = express();
const http = require('http');
const port = process.env.PORT || 3000;
var compiler = webpack(config);
require('./server/config/express')(app, port, compiler, config);
const server = http.createServer(app);
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function (err, req, res, next) {
res.status(err.code || 500)
.json({
status: 'error',
message: err
});
});
}
app.use(function (err, req, res, next) {
res.status(err.status || 500)
.json({
status: 'error',
message: err.message
});
});
server.on('close', () => {
models.sequelize.close();
});
My server config above is based in server folder and i wasn't expecting my webpack to build that folder. My build has being working fine for months until 3 days when it suddenly stopped throwing the errors above. It occurs to me that it is building/packaging the server folder which i wasn't expecting.
I then update my babel-loader to
{
loader: 'babel-loader',
test: /\.js$/,
exclude: [/node_modules/, /server/]
}
yet to no avail. I am really confused on how i can best configure this. My development suddenly stopped. Pls any help would be appreciated.

Answer 1

It turns out a colleague mistakenly referenced/imported a file from the server folder hence the issue. The line
import { authenticateUser } from '../../../server/controllers/user';
in one of the components in the src folder caused that.