Add Docker local build guide and links

Add a new developer-facing guide for local Docker image builds (single-architecture) in docs/development-guide/backend/docker.mdx and its English i18n counterpart. The guide explains environment requirements, build and run commands, and cleanup steps for local debugging without using docker buildx. Also update user-guide/backend/docker.md and its English i18n file to reference the new local build guide.

Author: t41372

docs/development-guide/backend/docker.mdx

@@ -0,0 +1,54 @@
+---
+sidebar_position: 2
+---
+
+# Docker 本地构建指南
+
+> 如果你想要的是使用我们提供的 docker 镜像部署 Open-LLM-VTuber 项目，可以看看 [Docker 部署](../../user-guide/backend/docker.md)
+
+## 说明
+- 项目的多架构镜像构建与推送已由 GitHub Actions 自动完成。
+- 本文档仅用于开发者本地构建调试镜像，不使用 `docker buildx`。
+
+## 本地环境要求
+- 已安装 `git`
+- 已安装 Docker（建议 Docker Engine 24+ 或 Docker Desktop 最新稳定版）
+- 可选：已安装 Docker Compose 插件（仅在你需要 `docker compose` 时）
+- 建议预留至少 `10GB` 可用磁盘空间（首次构建会下载较多依赖）
+
+可用以下命令自检：
+```
+git --version
+docker --version
+docker compose version
+```
+
+## 获取代码
+```
+git clone https://github.com/Open-LLM-VTuber/Open-LLM-VTuber.git
+cd Open-LLM-VTuber
+```
+
+## 本地构建镜像（单架构）
+在项目根目录执行：
+```
+docker build -t openllmvtuber/open-llm-vtuber:local -f dockerfile .
+```
+
+如需自定义镜像名或标签，替换 `openllmvtuber/open-llm-vtuber:local` 即可。
+
+## 可选：本地运行验证
+运行前请确认 `conf/conf.yaml` 已存在：
+```
+docker run --rm -it \
+  -p 12393:12393 \
+  -v "$(pwd)/conf:/app/conf" \
+  -v "$(pwd)/models:/app/models" \
+  openllmvtuber/open-llm-vtuber:local
+```
+
+## 清理本地 Docker 数据
+```
+docker system prune -a --volumes
+```
+

docs/user-guide/backend/docker.md

@@ -7,6 +7,11 @@ import TabItem from '@theme/TabItem';
 
 # Docker 部署
 
+> 关于本地构建 docker 镜像，参考 [Docker 本地构建指南](../../development-guide/backend/docker.mdx)
+
+## 关于我们的docker团队
+我们在 docker hub 成立了[openllmvtuber团队](https://hub.docker.com/orgs/openllmvtuber/members)，目前docker镜像由[@Harry_Y](https://github.com/Harry-Yu-Shuhang)维护。
+
 ## 下载配置文件
 
 ### git下载（适合有git基础的用户）

i18n/en/docusaurus-plugin-content-docs/current/development-guide/backend/docker.mdx

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+---
+sidebar_position: 2
+---
+
+# Docker Local Build Guide
+
+> If you want to deploy Open-LLM-VTuber using our pre-built Docker images, see [Docker Deployment](../../user-guide/backend/docker.md)
+
+## Notes
+- Multi-architecture image builds and pushes are automatically handled by GitHub Actions.
+- This document is only for developers who want to build debug images locally, without using `docker buildx`.
+
+## Local Environment Requirements
+- `git` installed
+- Docker installed (Docker Engine 24+ or the latest stable Docker Desktop recommended)
+- Optional: Docker Compose plugin installed (only if you need `docker compose`)
+- At least `10GB` of free disk space recommended (first build downloads many dependencies)
+
+You can verify your environment with these commands:
+```
+git --version
+docker --version
+docker compose version
+```
+
+## Get the Code
+```
+git clone https://github.com/Open-LLM-VTuber/Open-LLM-VTuber.git
+cd Open-LLM-VTuber
+```
+
+## Build Image Locally (Single Architecture)
+Run in the project root directory:
+```
+docker build -t openllmvtuber/open-llm-vtuber:local -f dockerfile .
+```
+
+To customize the image name or tag, replace `openllmvtuber/open-llm-vtuber:local` as needed.
+
+## Optional: Local Run Verification
+Before running, ensure `conf/conf.yaml` exists:
+```
+docker run --rm -it \
+  -p 12393:12393 \
+  -v "$(pwd)/conf:/app/conf" \
+  -v "$(pwd)/models:/app/models" \
+  openllmvtuber/open-llm-vtuber:local
+```
+
+## Clean Up Local Docker Data
+```
+docker system prune -a --volumes
+```
+

i18n/en/docusaurus-plugin-content-docs/current/user-guide/backend/docker.md

@@ -7,6 +7,12 @@ import TabItem from '@theme/TabItem';
 
 # Docker Deployment
 
+> For building Docker images locally, refer to the [Docker Local Build Guide](../../development-guide/backend/docker.mdx)
+
+## About Our Docker Team
+We have established the [openllmvtuber team](https://hub.docker.com/orgs/openllmvtuber/members) on Docker Hub.  
+The Docker images are currently maintained by [@Harry_Y](https://github.com/Harry-Yu-Shuhang).  
+
 ## Download configuration files
 
 ### Git clone (for users familiar with git)