From c49ff2a6fceea7aa1b2a5a37201d44b2af900c11 Mon Sep 17 00:00:00 2001
From: ittoview <ittoview@example.com>
Date: Fri, 22 May 2026 08:36:51 +0100
Subject: [PATCH] chore: cache learning map images

---
 nginx.conf | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/nginx.conf b/nginx.conf
index 76aa277..6c9ffa8 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -26,7 +26,14 @@ server {
         add_header Cache-Control "no-store";
     }
 
-    # 一图流图片目录，由 Docker 挂载提供，支持运行时新增图片
+    # 一图流图片文件缓存 30 天；新增图片建议使用新文件名，避免同名覆盖缓存未刷新
+    location ~* ^/learning-images/.+\.(png|jpg|jpeg|webp|gif|avif)$ {
+        root /usr/share/nginx/html;
+        expires 30d;
+        add_header Cache-Control "public, max-age=2592000";
+    }
+
+    # 一图流图片目录，由 Docker 挂载提供；目录列表不缓存，保证新增图片能及时被页面发现
     location /learning-images/ {
         alias /usr/share/nginx/html/learning-images/;
         autoindex on;