Simple

Config

stack.cue

package main

import (
    "stakpak.dev/devx/v1"
    "stakpak.dev/devx/v1/traits"
)

stack: v1.#Stack & {
    components: {
        cowsay: {
            traits.#Workload
            containers: default: {
                image: "docker/whalesay"
                command: ["cowsay"]
                args: ["Hello DevX!"]
            }
        }
    }
}

builder.cue

package main

import (
    "stakpak.dev/devx/v2alpha1"
    "stakpak.dev/devx/v2alpha1/environments"
)

builders: v2alpha1.#Environments & {
    dev: environments.#Compose
}

Build

devx build dev

Result

docker-compose.yml

version: "3"
volumes: {}
services:
  cowsay:
    image: docker/whalesay
    environment: {}
    depends_on: []
    command:
      - cowsay
      - Hello DevX!
    restart: always
    volumes: []