Build tailwindcss with docker

I am trying to run docker-compose with the latest github build, but it keeps exiting after building tailwindcss.

I'm calling the "bin/dev" within my docker file, starting the foreman processes but "yarn build:css --watch" builds and then exits with code 0, causing all other processes to terminate as well. The JS build runs fine and watch for changes.

Excerpt of output: 

web_1    | 20:41:23 css.1  | Done in 15.14s.
web_1    | 20:41:23 css.1  | exited with code 0
web_1    | 20:41:23 system | sending SIGTERM to all processes
web_1    | 20:41:24 web.1  | terminated by SIGTERM
web_1    | 20:41:24 js.1   | exited with code 1

Anybody who have run into this issue?