Настраиваемая через .env конфигурация

postgres-bookings/docker-compose.yml

@@ -3,17 +3,16 @@ services:
     image: postgres:17
     # container_name: pg-demo
     environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres
-      # гарантируем UTF-8 и предсказуемую сортировку
+      POSTGRES_USER: ${POSTGRES_USER:-postgres}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
       POSTGRES_INITDB_ARGS: "--encoding=UTF8 --lc-collate=en_US.UTF-8 --lc-ctype=en_US.UTF-8"
     ports:
-      - "5432:5432"
+      - "${PG_PORT:-5432}:5432"
     volumes:
       - pgdata:/var/lib/postgresql/data
       - ./initdb:/docker-entrypoint-initdb.d:ro
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres -d postgres"]
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d postgres"]
       interval: 5s
       timeout: 5s
       retries: 20