For US English data, enter directory containing *.wav and *.lab -- the latter just orthographic text prompts -- and run
docker run -v $PWD:/data -t psibre/kaldi-mfa bash -c 'cd /data; /mfa/dist/montreal-forced-aligner/bin/mfa_align /mfa/pretrained_models/english.zip . .'
This should create corresponding *.TextGrid files in this directory.