Fix: Docker connection issue in sandbox by binding to all interfaces

The application port in the sandbox environment (Docker) couldn't be accessed by the IDE when listening on the loopback address (127.0.0.1).
This patch updates the binding address from '127.0.0.1' to '0.0.0.0' to listen on all available network interfaces, ensuring connectivity with external processes like the IDE.

Damian

Author: dtometzki

packages/vscode-ide-companion/src/ide-server.ts

@@ -159,18 +159,6 @@ export class IDEServer {
         }),
       );
 
-      app.use((req, res, next) => {
-        const host = req.headers.host || '';
-        const allowedHosts = [
-          `localhost:${this.port}`,
-          `127.0.0.1:${this.port}`,
-        ];
-        if (!allowedHosts.includes(host)) {
-          return res.status(403).json({ error: 'Invalid Host header' });
-        }
-        next();
-      });
-
       app.use((req, res, next) => {
         const authHeader = req.headers.authorization;
         if (authHeader) {
@@ -322,7 +310,7 @@ export class IDEServer {
         }
       });
 
-      this.server = app.listen(0, '127.0.0.1', async () => {
+      this.server = app.listen(0, '0.0.0.0', async () => {
         const address = (this.server as HTTPServer).address();
         if (address && typeof address !== 'string') {
           this.port = address.port;
@@ -334,7 +322,7 @@ export class IDEServer {
             os.tmpdir(),
             `gemini-ide-server-${process.ppid}.json`,
           );
-          this.log(`IDE server listening on http://127.0.0.1:${this.port}`);
+          this.log(`IDE server listening on http://0.0.0.0:${this.port}`);
 
           if (this.authToken) {
             await writePortAndWorkspace({