error: cannot run ssh: No such file or directory fatal: unable to fork

[jpswade]

Here's the command:

#!/usr/bin/env bash
docker run --rm \
    --workdir /app \
    --volume ${PWD}:/app \
    --volume ~/.ssh:/root/.ssh \
    --volume ~/.composer:/root/.composer \
    composer/composer:php5-alpine install -o -n --no-scripts --ignore-platform-reqs

This is the (eventual) error:

error: cannot run ssh: No such file or directory
fatal: unable to fork

It seems like alpine is missing ssh, using the non-alpine version solved this problem.