fix(reverse-proxy): increase request header size limit

packages/reverse-proxy-service/src/server.ts

@@ -12,6 +12,16 @@ import store from './setup/store';
 import { COOKIE_SECRET } from './setup/env';
 import oidcAuth from './middleware/oidcAuth';
 import { updateApplicationCache } from './utils/applicationCache';
+import http from 'http';
+import https from 'https';
+
+declare module 'http' { interface Agent { maxHeaderSize?: number; } }
+declare module 'https' { interface Agent { maxHeaderSize?: number; } }
+
+const MAX_HEADER_SIZE = 16 * 1024 * 1024; // 16MB
+
+( http.globalAgent as http.Agent ).maxHeaderSize = MAX_HEADER_SIZE;
+( https.globalAgent as https.Agent ).maxHeaderSize = MAX_HEADER_SIZE;
 
 const getServer = async () => {
   const server = express();