version: "3.9"

services:
  phoenix:
    # The build parameters for this container.
    build:
      # Here we define that it should build from the current directory.
      context: .
    environment:
      # Variables to connect to our Postgres server.
      PGUSER: postgres
      PGPASSWORD: postgres
      PGDATABASE: poex_dev
      PGPORT: 5432
      # Hostname of our Postgres container.
      PGHOST: pg-master
    ports:
      # Mapping the port to make the Phoenix app accessible outside of the container.
      - "4000:4000"
    depends_on:
      # The DB container needs to be started before we start this container.
      - pg-master

  pg-master:
    image: kartoza/postgis:16-3.4
    restart: "always"
    environment:
      POSTGRES_USER: "postgres"
      POSTGRES_PASS: "postgres"
      POSTGRES_MULTIPLE_EXTENSIONS: postgis
    volumes:
      - pg-master:/var/lib/postgresql
    healthcheck:
      test: "exit 0"
volumes:
  pg-master: