Separate release and dev builds of the online editor

Let `npm run build` do a release build and `npm run start` be used for
development.

tools/online_editor/webpack.common.js

@@ -0,0 +1,49 @@
+const path = require('path');
+const HtmlWebPackPlugin = require('html-webpack-plugin');
+const WasmPackPlugin = require("@wasm-tool/wasm-pack-plugin");
+const dist = path.resolve(__dirname, "dist");
+
+module.exports = {
+    entry: {
+        app: './index.ts',
+        'editor.worker': 'monaco-editor/esm/vs/editor/editor.worker.js',
+        'json.worker': 'monaco-editor/esm/vs/language/json/json.worker',
+        'css.worker': 'monaco-editor/esm/vs/language/css/css.worker',
+        'html.worker': 'monaco-editor/esm/vs/language/html/html.worker',
+        'ts.worker': 'monaco-editor/esm/vs/language/typescript/ts.worker'
+    },
+    resolve: {
+        extensions: ['.ts', '.js']
+    },
+    output: {
+        globalObject: 'self',
+        filename: '[name].bundle.js',
+        path: dist
+    },
+    module: {
+        rules: [
+            {
+                test: /\.ts?$/,
+                use: 'ts-loader',
+                exclude: /node_modules/
+            },
+            {
+                test: /\.css$/,
+                use: ['style-loader', 'css-loader']
+            },
+            {
+                test: /\.ttf$/,
+                use: ['file-loader']
+            },
+        ]
+    },
+    plugins: [
+        new HtmlWebPackPlugin({
+            title: 'SixtyFPS Online Editor',
+            template: 'index.html'
+        }),
+        new WasmPackPlugin({
+            crateDirectory: path.resolve(__dirname, "../../api/sixtyfps-wasm-interpreter/"),
+        }),
+    ]
+};