修复Docker端口冲突为5433，添加.env配置，后端启动并通过健康检查

docker-compose.dev.yml

@@ -1,4 +1,3 @@
-version: '3.8'
 services:
   postgres:
     image: postgres:16-alpine
@@ -8,7 +7,7 @@ services:
       POSTGRES_PASSWORD: postgres
       POSTGRES_DB: kefu_sys
     ports:
-      - "5432:5432"
+      - "5433:5432"
     volumes:
       - pgdata:/var/lib/postgresql/data
 

server/.env.example

@@ -2,7 +2,7 @@ SERVER_PORT=8080
 GIN_MODE=debug
 
 DB_HOST=localhost
-DB_PORT=5432
+DB_PORT=5433
 DB_USER=postgres
 DB_PASSWORD=postgres
 DB_NAME=kefu_sys