docker-compose.yml

# Version of docker-compose.
version: '3'

# Containers we're going to run.
services:
   # Our Phoenix container.
   phoenix:
      # The build parameters for this container.
      build:
          # Here we define that it should build from the current directory.
          context: .
          args:
            - MIX_ENV=prod
      environment:
         # Variables to connect to our Postgres server.
         DB_USER: postgres
         DB_PASSWORD: postgres
         DB_NAME: arke-test
         DB_HOSTNAME: db
         DB_PORT: 5432

         PGUSER: postgres
         PGPASSWORD: postgres
         PGDATABASE: arke-test
         PGPORT: 5432
         PGHOST: db

         MIX_ENV: prod
         SECRET_KEY_BASE: change_me
      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.
         - db
   db:
      # We use the predefined Postgres image.
      image: postgres:14.4
      environment:
         # Set user/password for Postgres.
         POSTGRES_USER: postgres
         POSTGRES_PASSWORD: postgres
         # Set a path where Postgres should store the data.
         PGDATA: /var/lib/postgresql/data/pgdata
      restart: always
      ports:
         # Mapping the port to make the Phoenix app accessible outside of the container.
        - '5432:5432'
      volumes:
         - pgdata:/var/lib/postgresql/data
# Define the volumes.
volumes:
   pgdata: