feat: adding git ignore/webpack tutorial

dom-exercise/webpack-demo/package.json

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+{
+  "name": "webpack-demo",
+  "version": "1.0.0",
+  "description": "",
+  "private": true,
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "watch": "webpack --watch",
+    "start": "webpack serve --open --config webpack.dev.js",
+    "server": "node server.js",
+    "build": "webpack --config webpack.prod.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "css-loader": "^6.8.1",
+    "express": "^4.18.2",
+    "html-webpack-plugin": "^5.5.4",
+    "style-loader": "^3.3.3",
+    "webpack": "^5.89.0",
+    "webpack-cli": "^5.1.4",
+    "webpack-dev-middleware": "^6.1.1",
+    "webpack-dev-server": "^4.15.1",
+    "webpack-merge": "^5.10.0"
+  },
+  "dependencies": {
+    "lodash": "^4.17.21"
+  }
+}

dom-exercise/webpack-demo/server.js

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+const express = require('express');
+const webpack = require('webpack');
+const webpackDevMiddleware = require('webpack-dev-middleware');
+
+const app = express();
+const config = require('./webpack.config.js');
+const compiler = webpack(config);
+
+app.use(
+  webpackDevMiddleware(compiler, {
+    publicPath: config.output.publicPath,
+  })
+);
+
+app.listen(3000, function () {
+  console.log('Example app listening on port 3k');
+});

dom-exercise/webpack-demo/src/functionOne.js

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+const functionOne = () => console.log('FUNCTION ONE');
+
+export { functionOne };

dom-exercise/webpack-demo/src/index.js

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+import _ from 'lodash';
+import printMe from './print';
+import './style.css';
+import Icon from './gitlab.png';
+import { functionOne } from './functionOne';
+
+function component() {
+    const element = document.createElement('div');
+    const btn = document.createElement('button');
+
+    element.innerHTML = _.join(['Hello', 'webpack'], ' ');
+    element.classList.add('hello');
+
+    // add image to our file
+    const myIcon = new Image();
+    myIcon.src = Icon;
+
+    btn.innerHTML = 'Click me and check the console!';
+    btn.onclick = printMe;
+
+    element.appendChild(myIcon);
+    element.appendChild(btn);
+
+    return element;
+}
+
+functionOne();
+document.body.appendChild(component());

dom-exercise/webpack-demo/src/print.js

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+export default function printMe() {
+    console.log('I get called from print.js!');
+}

dom-exercise/webpack-demo/src/style.css

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+.hello {
+    color: red;
+}

dom-exercise/webpack-demo/webpack.common.js

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+const path = require('path');
+const HtmlWebpackPlugin = require('html-webpack-plugin');
+
+module.exports = {
+  entry: {
+        index: './src/index.js',
+        print: './src/print.js'
+    },
+    plugins: [
+        new HtmlWebpackPlugin({
+            title: 'Development',
+        }),
+    ],
+  output: {
+    filename: '[name].bundle.js',
+    path: path.resolve(__dirname, 'dist'),
+    clean: true,
+    publicPath: '/',
+  },
+  optimization: {
+      runtimeChunk: 'single',
+    },
+  module: {
+    rules: [
+      {
+        test: /\.css$/i,
+        use: ['style-loader', 'css-loader'],
+      },
+      {
+        test: /\.(png|svg|jp|jpeg|gif)$/i,
+        type: 'asset/resource',
+      },
+        ],
+    },
+};

dom-exercise/webpack-demo/webpack.dev.js

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+const { merge } = require('webpack-merge');
+const common = require('./webpack.common.js');
+
+module.exports = merge(common, {
+  mode: 'development',
+  devtool: 'inline-source-map',
+  devServer: {
+    static: './dist',
+    },
+});

dom-exercise/webpack-demo/webpack.prod.js

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+const { merge } = require('webpack-merge');
+const common = require('./webpack.common.js');
+
+module.exports = merge(common, {
+  mode: 'production',
+});