Notes on Docker+Heroku

app.json

{
  "name": "Kredits",
  "repository": "https://github.com/ambethia/kredits-server",
  "addons": [
    "heroku-postgresql"
  ]
}

docker-compose.yml

version: '2'
services:
  web:
    build: .
    command: 'bash -c ''yarn start'''
    working_dir: /usr/src/app
    environment:
      PORT: 8080
      DATABASE_URL: postgres://postgres:@herokuPostgresql:5432/postgres
    ports:
      - '8080:8080'
    links:
      - herokuPostgresql
  shell:
    build: .
    command: bash
    working_dir: /usr/src/app
    environment:
      PORT: 8080
      DATABASE_URL: postgres://postgres:@herokuPostgresql:5432/postgres
    ports:
      - '8080:8080'
    links:
      - herokuPostgresql
    volumes:
      - '.:/usr/src/app'
  herokuPostgresql:
    image: postgres

Dockerfile

FROM node

ENV NODE_ENV production
WORKDIR /usr/src/app

RUN curl -o- -L https://yarnpkg.com/install.sh | bash
ENV PATH /root/.yarn/bin:$PATH

COPY package.json yarn.lock migrations index.js ./
RUN yarn

CMD /root/.yarn/bin/yarn start

index.js

const http = require('http')
const PostGraphQL = require('postgraphql').default

const DATABASE_URL = process.env.DATABASE_URL || 'postgres://localhost:5432'
const PORT = process.env.PORT || 3000

http.createServer(PostGraphQL(DATABASE_URL, { graphiql: true })).listen(PORT)

package.json

{
  "private": true,
  "scripts": {
    "start": "node index.js",
    "deploy": "heroku container:push"
  },
  "dependencies": {
    "pg": "^6.1.2",
    "postgraphql": "^2.5.0",
    "yepql": "^2.2.1"
  },
  "devDependencies": {
    "eslint": "^3.13.1",
    "eslint-config-standard": "^6.2.1",
    "eslint-plugin-promise": "^3.4.0",
    "eslint-plugin-standard": "^2.0.1"
  },
  "engines": {
    "node": "7.4.0"
  }
}

Procfile

web: yarn start