version: '3.9' services: cryptcoin: image: postgres:13 ports: - 5432:5432 environment: POSTGRES_USER: ${POSTGRES_USER} POSTGRES_PASSWORD: ${POSTGRES_PASSWORD} POSTGRES_DB: ${POSTGRES_DB} networks: - CRY test-db: image: postgres:13 ports: - 5434:5434 environment: POSTGRES_USER: ${POSTGRES_USER} POSTGRES_PASSWORD: ${POSTGRES_PASSWORD} POSTGRES_DB: ${POSTGRES_DB} networks: - CRY networks: CRY: external: true