Add npm and React boilerplate

rollup.config.js

@@ -0,0 +1,41 @@
+import commonjs from '@rollup/plugin-commonjs';
+import nodeResolve from '@rollup/plugin-node-resolve';
+import replace from '@rollup/plugin-replace';
+import globals from 'rollup-plugin-node-globals';
+import styles from 'rollup-plugin-styles';
+import babel from '@rollup/plugin-babel';
+
+const env = process.env.NODE_ENV;
+
+const config = {
+    input: 'src/js/components/Root.js',
+    output: {
+        file: 'dist/build.js',
+        format: 'esm',
+        sourcemap: true,
+        name: 'Tofu',
+        inlineDynamicImports: true,
+        exports: 'auto',
+    },
+    plugins: [
+        styles(),
+        nodeResolve({
+            browser: true,
+            preferBuiltins: true,
+            extensions: ['.js', '.ts', '.tsx'],
+        }),
+        commonjs({
+            exclude: 'src/**',
+        }),
+        babel({
+            'babelHelpers': 'runtime',
+        }),
+        globals(),
+        replace({
+            'process.env.NODE_ENV': JSON.stringify(env === 'production' ? 'production' : 'development'),
+            'preventAssignment': true,
+        }),
+    ],
+};
+
+export default config;