Improved build setup

.npmignore

@@ -1,4 +1,5 @@
 src
 node_modules
+config
 .gitignore
 tsconfig.json

config/webpack.build.js

@@ -0,0 +1,33 @@
+const path = require('path');
+const root = path.join(__dirname, '../');
+const config = require(path.join(root, 'package.json'));
+const {CleanWebpackPlugin} = require('clean-webpack-plugin');
+
+module.exports = {
+    mode: 'production',
+    context: root, // to automatically find tsconfig.json
+    entry: path.join(root, 'src/index.ts'),
+    module: {
+        rules: [
+            {
+                test: /\.tsx?$/,
+                use: 'ts-loader',
+                exclude: /node_modules/
+            }
+        ]
+    },
+    devtool: 'source-map',
+    resolve: {
+        extensions: [ '.tsx', '.ts', '.js' ]
+    },
+    plugins: [
+        new CleanWebpackPlugin()
+    ],
+    output: {
+        filename: `index.min.js`,
+        path: path.join(root, 'build'),
+        libraryTarget: 'umd',
+        library: config.name,
+        umdNamedDefine: true
+    }
+};