API docs require internet access

Steps to reproduce:

- Be offline
- Go to http://localhost:8000/docs

Expected behavior:

I want to see the API documentation

Actual behavior:

I see a blank page. In the browser console, I see this:

```
Loading failed for the <script> with source “https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui-bundle.js”.
```