Add new file

config.js

+import { defineConfig } from "umi";
+import env from "./env";
+import routes from "./routes";
+import proxy from "./proxy";
+const { REACT_APP_ENV = "dev", NODE_ENV } = process.env;
+export default defineConfig({
+  outputPath: 'taian',
+  npmClient: "yarn",
+  plugins: [
+    "@umijs/plugins/dist/antd",
+    "@umijs/plugins/dist/locale",
+    "@umijs/plugins/dist/layout",
+    "@umijs/plugins/dist/initial-state",
+    "@umijs/plugins/dist/model",
+    "@umijs/plugins/dist/access",
+    "umi-plugin-keep-alive"
+  ],
+  antd: {},
+  model: {},
+  initialState: {},
+  define: env[REACT_APP_ENV],
+  routes,
+  hash: true,
+  history: {
+    type: 'hash',
+  },
+  manifest: {
+    basePath: "/",
+  },
+  proxy: proxy[REACT_APP_ENV || "dev"],
+  publicPath: NODE_ENV !== "development" ? "./" : "/",
+});