{"message":"Sudoku Image Detector API","version":"1.0.0","endpoints":{"/detect-sudoku-board":"POST - Detect and extract Sudoku grid from image","/detect-cell-digit":"POST - Detect single digit from cell image","/test/sample-sudoku-board":"GET - Sample Sudoku grid for debugging (no image)","/data/{filename}":"GET - Return image from data folder (e.g. /data/Sudoku.png)"}}