Want to contribute!

```
class ReadOnlyProxyView(ProxyView):
    http_method_names = ['get']
```

Usage
```
    path('users/', ReadOnlyProxyView.as_view(source='users/'), name='user-list'),
    path('users/<int:pk>/', ReadOnlyProxyView.as_view(source='users/%(pk)s'), name='user-list'),
```