logo customization

[DEFALTtttttt]

I'm very bad at css, I found that the image itself is here MeshCentral\node_modules\meshcentral\public\images\login\back.png, but it is located at the bottom left, where and how can it be moved to the middle of the screen behind the server login panel . And also remove or make the background itself transparent (instead of blue, something else)