Why test_input.json is a must?

I tried to create my own docker image for serverless, but without test_input.json. when handler gets to this line: runpod.serverless.start({"handler": handler}) i get error that test input not found. i don't need to test, why is it a must? also, in which directory should it be? i have different directories: # Start ComfyUI start_comfyui() { # Capture additional arguments from environment variables echo "Starting ComfyUI..." /runpod-volume/venv_cc12_cuda129/bin/python -u /home/comfyuser/ComfyUI/main.py --max-upload-size 20 --dont-print-server --preview-method taesd --enable-cors-header "*" --use-sage-attention --disable-xformers --fast fp16_accumulation --disable-auto-launch --disable-metadata --log-stdout } start_handler() { # Capture additional arguments from environment variables echo "Starting Handler..." /runpod-volume/venv_cc12_cuda129/bin/python -u /home/comfyuser/handler.py } start_comfyui & start_handler