Background image will cover window size

[LubosTran]

Describe the bug
When resizing windows the pokemon image will be cut out
To Reproduce
Resizing window

Expected behavior
Image will contains within window

Screenshots

Technical Info (please complete the following information)

• OS: Window
• Hyper version: lastest
• Hyper-Pokemon version: lastest

Additional context
Maybe problems in index.html to set the position to cover instead of relative ?