Run the webapp server fails in Dev Containers

**Describe the issue:**
When executing `npm start` according to [README.md](https://github.com/Azure-Samples/azure-openai-assistant-javascript?tab=readme-ov-file#vs-code-dev-containers), the error is as follows:

**Repro Steps:**
1. Start Docker Desktop
2. Open the project: Open in Dev Containers
3. Run `azd auth login`
4. Run `azd up`
5. Run `npm install --prefix api` and `npm start --prefix api`
6. Run `npm install` and `npm start`

**Environment:**
- Azd version: azd version 1.9.5 (commit cd2b7af9995d358aab33c782614f801ac1997dde)
- OS: VS Code Dev Containers

**Expected behavior:**
Run `npm start` can successfully.

@jongio and @manekinekko for notification.