diff --git a/docs/self-hosting/advanced/upstream-sync.mdx b/docs/self-hosting/advanced/upstream-sync.mdx
index 5324ea0eb909..ad357e448659 100644
--- a/docs/self-hosting/advanced/upstream-sync.mdx
+++ b/docs/self-hosting/advanced/upstream-sync.mdx
@@ -40,6 +40,18 @@ After forking the project, due to Github's limitations, you need to manually ena
   src="https://github-production-user-asset-6210df.s3.amazonaws.com/17870709/266985177-7677b4ce-c348-4145-9f60-829d448d5be6.png"
 />
 
+If you encounter a sync failure, you need to manually click "Update Branch" once.
+
+<Image
+  alt="GitHub Action Sync Failure"
+  src="https://github.com/user-attachments/assets/9baacac6-5af4-460b-862d-682b76c18459"
+/>
+
+<Image
+  alt="Manually Sync 'Update Branch'"
+  src="https://github.com/user-attachments/assets/d524c20d-306a-45bc-971b-96920b87fab4"
+/>
+
 ## `B` Docker Deployment
 
 Upgrading the Docker deployment version is very simple, you just need to redeploy the latest LobeChat image. Here are the commands required to perform these steps:
diff --git a/docs/self-hosting/advanced/upstream-sync.zh-CN.mdx b/docs/self-hosting/advanced/upstream-sync.zh-CN.mdx
index eab56be998a7..17395ba28943 100644
--- a/docs/self-hosting/advanced/upstream-sync.zh-CN.mdx
+++ b/docs/self-hosting/advanced/upstream-sync.zh-CN.mdx
@@ -35,6 +35,18 @@ tags:
   src="https://github-production-user-asset-6210df.s3.amazonaws.com/17870709/266985177-7677b4ce-c348-4145-9f60-829d448d5be6.png"
 />
 
+如果你遇到了同步失败的情况，你需要手动重新点一次 「Update Branch」。
+
+<Image
+  alt="GitHub Action 同步失败"
+  src="https://github.com/user-attachments/assets/9baacac6-5af4-460b-862d-682b76c18459"
+/>
+
+<Image
+  alt="手动同步 「Update Branch」"
+  src="https://github.com/user-attachments/assets/d524c20d-306a-45bc-971b-96920b87fab4"
+/>
+
 ## `B` Docker 部署
 
 Docker 部署版本的升级非常简单，只需要重新部署 LobeChat 的最新镜像即可。 以下是执行这些步骤所需的指令：
diff --git a/docs/self-hosting/server-database/vercel.mdx b/docs/self-hosting/server-database/vercel.mdx
index 9226b19cb413..4861d9791c3f 100644
--- a/docs/self-hosting/server-database/vercel.mdx
+++ b/docs/self-hosting/server-database/vercel.mdx
@@ -109,6 +109,10 @@ KEY_VAULTS_SECRET=jgwsK28dspyVQoIf8/M3IIHl1h6LYYceSYNXeLpy6uk=
 
 Make sure to add this to the Vercel environment variables as well.
 
+### Add the `APP_URL` Environment Variable
+
+Finally, you need to add the `APP_URL` environment variable, which specifies the URL address of the LobeChat application.
+
 </Steps>
 
 ## 2. Configure Authentication Service
@@ -394,6 +398,8 @@ src={'https://github.com/lobehub/lobe-chat/assets/28616219/9cb5150d-6e1e-4c59-9a
 For easy copying, here is a summary of the environment variables required to configure the server-side database:
 
 ```shell
+APP_URL=https://your-project.com
+
 # Specify the service mode as server
 NEXT_PUBLIC_SERVICE_MODE=server
 
diff --git a/docs/self-hosting/server-database/vercel.zh-CN.mdx b/docs/self-hosting/server-database/vercel.zh-CN.mdx
index ca636b06f237..1586530dc27f 100644
--- a/docs/self-hosting/server-database/vercel.zh-CN.mdx
+++ b/docs/self-hosting/server-database/vercel.zh-CN.mdx
@@ -102,6 +102,10 @@ KEY_VAULTS_SECRET=jgwsK28dspyVQoIf8/M3IIHl1h6LYYceSYNXeLpy6uk=
 
 同样需要将其添加到 Vercel 环境变量中。
 
+### 添加 `APP_URL` 环境变量
+
+该部分最后需要添加 APP_URL 环境变量，用于指定LobeChat 应用的 URL 地址。
+
 </Steps>
 
 ## 二、 配置身份验证服务
@@ -375,6 +379,8 @@ S3_PUBLIC_DOMAIN=https://s3-dev.your-domain.com
 为方便一键复制，在此汇总配置服务端数据库所需要的环境变量：
 
 ```shell
+APP_URL=https://your-project.com
+
 # 指定服务模式为 server
 NEXT_PUBLIC_SERVICE_MODE=server