Fix mongosh, DCA price, compose healthcheck and cleanup

11_compose/11.4_commands.md

@@ -26,7 +26,7 @@ Docker Compose 提供了丰富的命令来管理项目和容器。本节将详
 
 **配置验证**：
 
-- `docker compose config`：验证 docker-compose.yml 格式是否正确
+- `docker compose config`：验证 compose.yaml (或 docker-compose.yml) 格式是否正确
 
 ### 11.4.1 命令对象与格式
 

11_compose/demo/django/docker-compose.yml

@@ -5,6 +5,11 @@ services:
     image: postgres
     environment:
       POSTGRES_PASSWORD: 'postgres'
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
 
   web:
     build: .
@@ -13,3 +18,6 @@ services:
       - .:/code
     ports:
       - "8000:8000"
+    depends_on:
+      db:
+        condition: service_healthy