From ca5e74ee9836be819a344af0fbbcdce04f953401 Mon Sep 17 00:00:00 2001
From: Your Name <aa@bb.com>
Date: Wed, 12 Aug 2026 12:54:41 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E9=9D=99=E6=80=81=E8=B5=84?=
 =?UTF-8?q?=E6=BA=90=E5=8F=91=E5=B8=83=E5=90=8E=E4=B8=8D=E7=94=9F=E6=95=88?=
 =?UTF-8?q?:=20/umd/=E7=BC=93=E5=AD=98=E7=AD=96=E7=95=A5=E4=BB=8Eimmutable?=
 =?UTF-8?q?=E6=94=B9=E4=B8=BAno-cache?=
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构建产物文件名不带内容哈希，一年免验证的缓存策略导致每次蓝绿发布后
浏览器和CDN都会继续吃旧版本，用户需要清缓存或开无痕窗口才能看到更新。
改为no-cache后浏览器/CDN每次都会带条件请求向源站确认，未变化时只是
一次很快的304，一旦文件真的变了会立刻拿到新内容，不再需要手动清缓存。
---
 docker/nginx.conf | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docker/nginx.conf b/docker/nginx.conf
index 54699d93..f02a7bc2 100644
--- a/docker/nginx.conf
+++ b/docker/nginx.conf
@@ -11,8 +11,11 @@ server {
         try_files $uri $uri/ /index.html;
     }
 
+    # Filenames here aren't content-hashed, so a long/immutable cache would keep
+    # serving a stale bundle after every deploy. Force revalidation instead:
+    # cheap 304s when unchanged, immediate pickup of new content when not.
     location /umd/ {
-        add_header Cache-Control "public, max-age=31536000, immutable";
+        add_header Cache-Control "no-cache";
     }
 
     location /img/ {