docker-compose for kong, konga and elastic

docker-compose.yml

version: "3"

networks:
 kong-net:
  driver: bridge

services:

  #######################################
  # Postgres: The database used by Kong
  #######################################
  kong-database:
    image: postgres:11
    restart: always
    networks:
      - kong-net
    environment:
      POSTGRES_USER: kong
      POSTGRES_DB: kong
#    ports:
#      - "5432:5432"
    expose:
      - 5432
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "kong"]
      interval: 5s
      timeout: 5s
      retries: 5

  #######################################
  # Kong database migration
  #######################################
  kong-migration:
    image: kong:0.14
    command: "kong migrations up"
    networks:
      - kong-net
    restart: on-failure
    environment:
      KONG_PG_HOST: kong-database
    links:
      - kong-database
    depends_on:
      - kong-database

  #######################################
  # Kong: The API Gateway
  #######################################
  kong:
    image: kong:0.14
    restart: always
    networks:
      - kong-net
    environment:
      KONG_PG_HOST: kong-database
      KONG_PROXY_LISTEN: 0.0.0.0:8000
      KONG_PROXY_LISTEN_SSL: 0.0.0.0:8443
      KONG_ADMIN_LISTEN: 0.0.0.0:8001
    depends_on:
      - kong-migration
      - kong-database
    healthcheck:
      test: ["CMD", "curl", "-f", "http://kong:8001"]
      interval: 5s
      timeout: 2s
      retries: 15
    ports:
#      - "8001:8001"
      - "8000:8000"

  #######################################
  # Konga database prepare
  #######################################
  konga-prepare:
    image: pantsel/konga:0.13.0
    command: "-c prepare -a postgres -u postgresql://kong@kong-database:5432/konga_db"
    networks:
      - kong-net
    restart: on-failure
    links:
      - kong-database
    depends_on:
      - kong-database

  #######################################
  # Konga: Kong GUI
  #######################################
  konga:
    image: pantsel/konga:0.13.0
    restart: always
    networks:
        - kong-net
    environment:
      DB_ADAPTER: postgres
      DB_HOST: kong-database
      DB_USER: kong
      TOKEN_SECRET: km1GUr4RkcQD7DewhJPNXrCuZwcKmqjb
      DB_DATABASE: konga_db
      NODE_ENV: production
    depends_on:
      - kong-database
    ports:
      - "1337:1337"

  #######################################
  # Elastic: Set up an elastic docker behind Kong
  #######################################
  elastic:
    container_name: elastic
    image: docker.elastic.co/elasticsearch/elasticsearch:6.5.4
    restart: always
    networks:
      - kong-net
    environment:
      - "discovery.type=single-node"

  #######################################
  # Rstudio for having a nice IDE
  #######################################
  rstudio:
    image: rocker/tidyverse:3.5.0
    container_name: rstudio
    restart: always
    networks:
      - kong-net
    ports:
      - "8787:8787"
    volumes:
      - ./rstudio:/home/mikkel
    environment:
      - USER=user1
      - PASSWORD=user1