I created the project and had --host-0.0.0.0 in the Docker file by accident.
I changed it too --host=0.0.0.0.
But every time I try to do docker-compose up I am presented with this error
The "--host-0.0.0.0" option does not exist.
Is it cached somewhere or what?
You need to rebuild the image. Compose wont detect by default that the image should be re-built
Quotting from https://docs.docker.com/compose/reference/build/
If you change a service’s Dockerfile or the contents of its build directory, run docker-compose build to rebuild it.
If you want to force it to rebuild, use
docker-compose up --build