Having trouble with building Docker image

I'm trying to build a docker image for a software using docker build -t cytools .

Here is the output that I'm confused about:

[+] Building 0.0s (1/2)                                                          => [internal] load build definition from Dockerfile                       0.0s => => transferring dockerfile: 2B                                         0.0sfailed to solve with frontend dockerfile.v0: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount346931491/Dockerfile: no such file or directory

Does anyone know what this means? I am new to all this, so sorry if I didn't use the correct terminology or give the full picture!