buildx failed with: ERROR: failed to solve: process "/bin/sh -c cd pillow_heif && python -m venv myenv && source myenv/bin/activate && python3 -m pip install -v \".[tests]\"; echo \"**** Build Done ****\" && python3 -c \"import pillow_heif; print(pillow_heif.libheif_info())\" && pytest && echo \"**** Test Done ****\"" did not complete successfully: exit code: 1

FromAsCasing: 'as' and 'FROM' keywords' casing do not match More info: https://docs.docker.com/go/dockerfile/rule/from-as-casing/