diff --git a/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs b/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs
index e6d88804d8606f30dd69cad2da1e1fd216381c3c..f5a0fa04185e01e593c74fd334012c88d85324f8 100644
--- a/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs
+++ b/ZR.Admin.WebApi/Controllers/System/SysLoginController.cs
@@ -1,4 +1,4 @@
-using Lazy.Captcha.Core;
+using Lazy.Captcha.Core;
 using Microsoft.AspNetCore.Mvc;
 using ZR.Admin.WebApi.Filters;
 using ZR.Infrastructure.Helper;
@@ -141,9 +141,9 @@ namespace ZR.Admin.WebApi.Controllers.System
 
             SysConfig sysConfig = sysConfigService.GetSysConfigByKey("sys.account.captchaOnOff");
             var captchaOff = sysConfig?.ConfigValue ?? "0";
-            var info = SecurityCodeHelper.Generate(uuid, 60);
-            var obj = new { captchaOff, uuid, img = info.Base64 };// File(stream, "image/png")
-
+            CaptchaData? info = null;
+            if(captchaOff == "0") info = SecurityCodeHelper.Generate(uuid, 60);
+            var obj = new { captchaOff, uuid, img = info?.Base64 };// File(stream, "image/png")
             return SUCCESS(obj);
         }
 
diff --git a/ZR.Admin.WebApi/Dockerfile b/ZR.Admin.WebApi/Dockerfile
index e62587c5310d6be37c5f269b4e756a4fa18863d6..4079850aefef33b6aed911d67d7f23bf0ddad45c 100644
--- a/ZR.Admin.WebApi/Dockerfile
+++ b/ZR.Admin.WebApi/Dockerfile
@@ -1,4 +1,7 @@
-FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
+#FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
+#dotnet core 默认镜像无法生成图片
+FROM cosmoeky/dotnet7.0:20231208 AS build
+
 #创建 /app文件夹
 WORKDIR /app
 #创建挂载目录,用于将程序部署在服务器本地
@@ -7,15 +10,18 @@ WORKDIR /app
 EXPOSE 8888
 VOLUME /app/logs
 #COPY bin/Release/net5.0/publish/ app/
-COPY . app/
+COPY . /app/
 
 #设置容器内的时区，如果不设置，默认时区是标准时间比北京时间晚8个小时
-RUN echo "Asia/shanghai" > /etc/timezone
-RUN cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
+#RUN echo "Asia/shanghai" > /etc/timezone
+#RUN cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
+#已经打包到cosmoeky/dotnet7.0里面了
+
+
 
 # 复制发布文件到工作目录
 #COPY . app/
 WORKDIR /app
 
 #等价于 dotnet ZR.Admin.WebApi.dll，如果不指定启动端口默认在docker里面启动端口是80端口
-ENTRYPOINT ["dotnet", "ZR.Admin.WebApi.dll", "--server.urls","http://*:8888"]
\ No newline at end of file
+ENTRYPOINT ["dotnet", "ZR.Admin.WebApi.dll", "--server.urls","http://*:8888"]