How to convert a Dockerfile to a docker compose image?

Question

This is how I'm creating a docker image with nodeJS and meteorJS based on an ubuntu image. I'll use this image to do some testing.

Now I'm thinking of doing this via docker compose. But is this possible at all? Can I convert those commands into a docker compose yml file?

FROM ubuntu:16.04

COPY package.json ./

RUN apt-get update -y && \
    apt-get install -yqq \
        python \
        build-essential \
        apt-transport-https \
        ca-certificates \
        curl \
        locales \
        nodejs \
        npm \
        nodejs-legacy \
        sudo \
        git

## NodeJS and MeteorJS
RUN curl -sL https://deb.nodesource.com/setup_4.x | bash -
RUN curl https://install.meteor.com/ | sh

## Dependencies
RUN npm install -g eslint eslint-plugin-react
RUN npm install

## Locale
ENV OS_LOCALE="en_US.UTF-8"
RUN locale-gen ${OS_LOCALE}
ENV LANG=${OS_LOCALE} LANGUAGE=en_US:en LC_ALL=${OS_LOCALE}

## User
RUN useradd ubuntu && \
    usermod -aG sudo ubuntu && \
    mkdir -p /builds/core/.meteor /home/ubuntu && \
    chown -Rh ubuntu:ubuntu /builds/core/.meteor && \
    chown -Rh ubuntu:ubuntu /home/ubuntu
USER ubuntu

Answer 1

Docker Compose doesn't replace your Dockerfile, but you can use Docker Compose to build an image from your Dockerfile:

version: '3'
services:
  myservice:
    build:
      context: /path/to/Dockerfile/dir
      dockerfile: Dockerfile
    image: result/latest

Now you can build it with:

docker-compose build

And start it with:

docker-compose up -d