更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/css-to-react-native/src/transforms/boxShadow.js

@@ -0,0 +1,11 @@
+import { parseShadow } from './util'
+
+export default tokenStream => {
+  const { offset, radius, color } = parseShadow(tokenStream)
+  return {
+    shadowOffset: offset,
+    shadowRadius: radius,
+    shadowColor: color,
+    shadowOpacity: 1,
+  }
+}