docker-compose-dev.yml

# Docker compose version
version: "3"

# Container called api. "build" in the current directory (.). Ports to open (array or dashes. Syntax <port on localhost>:<port on container>),
# if we recieve traffic from localhost we forward it to the port on the container. Port is the one our app listens to.
services:
  api:
    # Command to create the tables in the postgres container using alembic
    command: bash -c "alembic upgrade head && uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload"
    build: .
    depends_on:
      - postgres
    ports: 
      - 8000:8000
    volumes:
      # path_folder_to_sync_local_machine : container_folder : read_only
      - ./:/usr/src/app/:ro
    # env_file:
    #   - ./.env
    environment:
      - DATABASE_HOSTNAME=postgres
      - DATABASE_PORT=5432
      - DATABASE_PASSWORD=nicopostgres
      - DATABASE_NAME=fastapi
      - DATABASE_USERNAME=postgres
      - SECRET_KEY=09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7
      - ALGORITHM=HS256
      - ACCESS_TOKEN_EXPIRE_MINUTES=30
  
  postgres:
    image: postgres
    environment:
      # Credentails don't have to be the same as in the local machine
      - POSTGRES_PASSWORD=nicopostgres
      - POSTGRES_DB=fastapi

    volumes:
      # Path in the container that postgres is going to write to (local machine). postgres-db is the name we give to the volume
      - postgres-db:/var/lib/postgresql/data

# Globally define where the app is going to write to. Multiple containers can acces to volumes
volumes:
    postgres-db: