feat: 支持使用环境变量 SUB_STORE_X_POWERED_BY 自定义响应头中的 X-Powered-By

Author: xream

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.20.44",
+  "version": "2.20.45",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and Shadowrocket.",
   "main": "src/main.js",
   "scripts": {

backend/src/vendor/express.js

@@ -9,7 +9,8 @@ export default function express({ substore: $, port, host }) {
         'Access-Control-Allow-Methods': 'POST,GET,OPTIONS,PATCH,PUT,DELETE',
         'Access-Control-Allow-Headers':
             'Origin, X-Requested-With, Content-Type, Accept',
-        'X-Powered-By': 'Sub-Store',
+        'X-Powered-By':
+            eval('process.env.SUB_STORE_X_POWERED_BY') || 'Sub-Store',
     };
 
     // node support