* add more two funcoes de troca de cor
*add invert colors
*check file type
*mask

**added:
recolor palette based transfer, recolor reinhard v2 and recolor linear transfer. => need to add to the backend.

`
source ./env/bin/activate
`
#how to run:
#source env/bin/activate     
#uvicorn server:app --reload
`


ERRORS TODO:
PALETTE ALGO IS WORKING BUT GIVING WARNINGS AND ERRORS.
DOMINANT COLOR IS BROKEN