Fix webpack-dev-server setup

redash/handlers/static.py

@@ -24,4 +24,4 @@ def render_index():
 @routes.route(org_scoped_rule('/<path:path>'))
 @routes.route(org_scoped_rule('/'))
 def index(**kwargs):
-    return render_index()
+    return render_index()

redash/handlers/webpack.py

@@ -25,4 +25,4 @@ def configure_webpack(app):
     def webpack_assets():
         return {
             'asset_url': get_asset,
-        }
+        }

webpack.config.js

@@ -143,8 +143,11 @@ const config = {
   },
   devServer: {
     inline: true,
-    historyApiFallback: true,
+    historyApiFallback: {rewrites: [
+      { from: /./, to: '/static/index.html' }
+    ]},
     contentBase: path.join(__dirname, 'client', 'app'),
+    publicPath: '/static/',
     proxy: [{
       context: [
         '/login', '/invite', '/setup', '/images', '/js', '/styles',