Download the file and check the hint:
Hint: Check all the domains. Don't be a script kiddie...
git clone https://github.com/0xcomposure/FFTStegPic
Go ahead and run the:
pip3 install opencv-python
just to cover all the bases.
When we try to run the FFTStegPic.py script, it asks us for the FULL path to the image. We can't use ../ trust me I tried. Once we give it the full path, an image pops up with the flag!