使用环境变量配置Redis host，默认localhost，支持多环境部署

Author: Layau-code

src/main/resources/application.yml

@@ -20,7 +20,7 @@ spring:
     database-platform: org.hibernate.dialect.MySQL8Dialect
   data:
     redis:
-      host: 47.97.110.128
+      host: ${REDIS_HOST:localhost}
       port: 6379
       password: ${REDIS_PASSWORD}
       timeout: 2s