Update .webpackrc.js (#216)

Revert wrong address.
diff --git a/.webpackrc.js b/.webpackrc.js
index c3bf5d8..aba80ef 100755
--- a/.webpackrc.js
+++ b/.webpackrc.js
@@ -42,7 +42,7 @@
 
 if (process.env.NO_MOCK) {
   config.proxy['/api'] =  {
-    target: 'http://106.75.237.45:12800',
+    target: 'http://localhost:12800',
     changeOrigin: true,
     pathRewrite: path => {
       console.log(path);