支持非根目录部署

back/config/serverEnv.ts

@@ -0,0 +1,20 @@
+import { Request, Response } from 'express';
+import { pick } from 'lodash';
+
+let pickedEnv: Record<string, string>;
+
+function getPickedEnv() {
+  if (pickedEnv) return pickedEnv;
+  const picked = pick(process.env, ['QlBaseUrl']);
+  pickedEnv = picked as Record<string, string>;
+  return picked;
+}
+
+export function serveEnv(_req: Request, res: Response) {
+  res.type('.js');
+  res.send(
+    Object.entries(getPickedEnv())
+      .map(([k, v]) => `window.__ENV__${k}=${JSON.stringify(v)};`)
+      .join('\n'),
+  );
+}