Make the app name configurable even after the project is built (#731)

### What problem does this PR solve?

Make the app name configurable even after the project is built #730 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/.umirc.ts

@@ -1,7 +1,9 @@
 import { defineConfig } from 'umi';
+import { appName } from './src/conf.json';
 import routes from './src/routes';
 
 export default defineConfig({
+  title: appName,
   outputPath: 'dist',
   // alias: { '@': './src' },
   npmClient: 'npm',
@@ -25,9 +27,10 @@ export default defineConfig({
     },
   },
   devtool: 'source-map',
+  copy: ['src/conf.json'],
   proxy: {
     '/v1': {
-      target: '',
+      target: 'http://123.60.95.134:9380/',
       changeOrigin: true,
       // pathRewrite: { '^/v1': '/v1' },
     },