Add level1 URL redirect for level1 endpoints

A small issue. Currently we have 

- level 1 data: `/json/shots`
- level 2 data: `/json/level2/shots`

I think we should add a redirect for the level 1 data so we can have `json/level1`. Something like:

```python
@router.post('/json/shots')
@router.post('/json/level1/shots')
def get_shots():
  ...
```