docker executable file not found in $PATH

Question

Trying to run a rails migration on a running docker compose container throws this error:

$ docker-compose run webapp rails db:migrate

Answer 1

I don't know why this is happening, and I've filed an issue, but in the meantime, here's a workaround:

docker-compose run webapp bundle exec rails db:migrate

Please answer this question with a proper fix, and I'll accept your answer.