Add vuestic-ui reference and replace images

[Epic spinner site](https://epic-spinners.epicmax.co/) is a bit outdated.

![image](https://user-images.githubusercontent.com/5394573/173836342-28b0d2f6-2560-4c83-9c19-5934d254de89.png)

- [ ] Add block for vuestic UI.
- [ ] Replace image for vuestic admin.