Add new just-based flow for putting files into pier

gall-app/package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "start": "node install.js",
     "serve": "cross-env NODE_ENV=development webpack-dev-server --config webpack.dev.js",
-    "build": "cross-env NODE_ENV=production webpack --config webpack.prod.js"
+    "build": "cross-env NODE_ENV=production webpack --config webpack.prod.js",
+    "build-development": "cross-env NODE_ENV=production webpack --config webpack.development.dev.js"
   },
   "author": "Tlon Corp",
   "license": "MIT",

gall-app/webpack.development.dev.js

@@ -0,0 +1,53 @@
+const path = require('path');
+const urbitrc = require('./urbitrc');
+
+module.exports = {
+  mode: 'production',
+  entry: {
+     app: './src/index.js'
+  },
+  module: {
+    rules: [
+      {
+        test: /\.jsx?$/,
+        use: {
+          loader: 'babel-loader',
+          options: {
+            presets: ['@babel/preset-env', '@babel/preset-react'],
+            plugins: [
+              '@babel/transform-runtime',
+              '@babel/plugin-proposal-object-rest-spread',
+              '@babel/plugin-proposal-optional-chaining',
+              '@babel/plugin-proposal-class-properties'
+            ]
+          }
+        },
+        exclude: /node_modules/
+      },
+      {
+         test: /\.css$/i,
+        use: [
+          // Creates `style` nodes from JS strings
+          'style-loader',
+          // Translates CSS into CommonJS
+          'css-loader',
+          // Compiles Sass to CSS
+          'sass-loader'
+        ]
+      }
+    ]
+  },
+  resolve: {
+    extensions: ['.js']
+  },
+  devtool: 'inline-source-map',
+  output: {
+    filename: 'bundle.js',
+    path: path.resolve('./urbit/app/browsermanager/js'),
+    publicPath: '/',
+  },
+  optimization: {
+    minimize: false,
+    usedExports: true
+  }
+};

justfile

@@ -3,4 +3,4 @@ copy-to-pier:
     cp -r gall-app/urbit/* $PIER
 
 build-javascript:
-    yarn --cwd gall-app run build
+    yarn --cwd gall-app run build-development