chore: 针对ThinkPHP 6.x 系列，支持自定义.env 文件加载

src/.env.production

@@ -0,0 +1,25 @@
+APP_DEBUG = false
+APP_TRACE = false
+
+[APP]
+DEFAULT_TIMEZONE = Asia/Shanghai
+ENV_MODE = production
+
+[LANG]
+default_lang = zh-cn
+
+[DATABASE]
+TYPE = mysql
+HOSTNAME = production_mysql_host
+DATABASE = shop_mallnew_prod
+USERNAME = prod_user
+PASSWORD = prod_password
+HOSTPORT = 3306
+CHARSET = utf8
+DEBUG = false
+
+[redis]
+HOST = production_redis_host
+PORT = 6379
+PASSWORD = production_redis_password
+EXPIRY = 86400