context or workdir for docker-compose

Question

I'm learning docker

I need to specify the working directory for a docker image, I think that'll be something like this:

version: '2' services:   test:     build:       context: ./dir 

Now I want to make the image python:onbuild to run on the ./dir, but I dont want to create any Dockerfile inside the ./dir.

The docker-compose manual says nothing about that.

Is it possible? How to do that?

Answer 1

I think you're looking for working_dir. Search for "working_dir" in the docker-compose reference.

Answer 2

You can specify the working directory as follows.

version: '2' services:   test:     build:       context: ./dir     working_dir: /dir