Update guides about ffmpeg docker image (#374)

* update ffmpeg image guide

* fix typo in docker ffmpeg troubleshooting desc

* add docker image building guide

* fix "Use Docker" guide English version title level

* move docker build guide block

* fix tab name for docker image beta version

Author: Mmx233

docs/guide/install/docker.md

@@ -18,7 +18,7 @@ star: true
 
 # Use Docker
 
-See the log output for the admin's info:
+## See the admin's info:
 
 #### Lower than v3.25.0
 
@@ -37,7 +37,7 @@ docker exec -it alist ./alist admin random
 docker exec -it alist ./alist admin set NEW_PASSWORD
 ```
 
-### **Release version**
+## **Release version**
 
 #### **docker-cli**
 
@@ -109,11 +109,16 @@ services:
 ### **Specify version**
 See https://hub.docker.com/r/xhofe/alist for details
 
-### **Docker-ffmpeg**
+### **Image with built-in ffmpeg**
 
-- https://github.com/alist-org/alist/pull/6054
+You can switch to image with out-of-the-box ffmpeg environment by adding `-ffmpeg` to any image tag.
 
-I'm not sure if the method of **docker-compose** is correct. If it's not correct, you can give us feedback.
+If the thumbnail feature is still not working, please verify the following:
+
++ You are using local storage
++ Switched to grid view
++ The thumbnail switch in local storage driver settings is enabled
++ The configuration path for the thumbnail cache folder in local storage is correct, for example, `data/thumbnail`
 
 ::: tabs#Docker-ffmpeg
 
@@ -144,7 +149,7 @@ services:
         restart: unless-stopped
 ```
 
-@tab main
+@tab beta
 
 **docker-cli**
 
@@ -186,7 +191,27 @@ In this instance `PUID=1000` and `PGID=1000`, to find yours use `id user` as bel
     uid=1000(dockeruser) gid=1000(dockergroup) groups=1000(dockergroup)
 ```
 
-### **Additional notes about the offline download feature**
+### **Manually build Docker image**
+
+Install Docker, clone the repository, and navigate to the root directory of the repository, no additional preparation is needed.
+
+::: tabs#Docker-build
+
+@tab basic
+
+```bash
+docker build -t xhofe/alist:latest .
+```
+
+@tab with ffmpeg
+
+```bash
+docker build -t xhofe/alist:latest-ffmpeg --build-arg INSTALL_FFMPEG=true .
+```
+
+:::
+
+## **Additional notes about the offline download feature**
 
 If the image is not pulled using the '''docker pull --platform''' parameter, docker may pull the 32-bit image on the 64-bit operating system, which may cause the offline download function to be unavailable even under normal configuration.
 
@@ -200,7 +225,7 @@ If the CPU architecture is 32-bit, there is currently no solution available.
 
 
 
-### **How to update Docker installation?**
+## **How to update Docker installation?**
 
 ::: details docker-cli update
 1. docker ps -a #View the container (find the ID of the Alist container)

docs/zh/guide/install/docker.md

@@ -117,13 +117,16 @@ services:
 
 有关详细信息，请参阅 https://hub.docker.com/r/xhofe/alist
 
+### **内置 ffmpeg 版镜像**
 
+在任何镜像 tag 后添加 `-ffmpeg` 即可切换到带有开箱即用的 ffmpeg 环境版本镜像
 
-### **Docker-ffmpeg**
+如果缩略图功能仍无法使用，请确认:
 
-- https://github.com/alist-org/alist/pull/6054
-
-**docker-compose** 的方式不确定是否正确，如果不正确可以反馈
++ 使用的是本地存储
++ 切换到网格视图
++ 本地存储的缩略图开关开启
++ 本地存储的缩略图缓存文件夹配置路径正确，例如 `data/thumbnail`
 
 ::: tabs#Docker-ffmpeg
 
@@ -196,6 +199,26 @@ services:
     uid=1000(dockeruser) gid=1000(dockergroup) groups=1000(dockergroup)
 ```
 
+### **手动编译 Docker 镜像**
+
+安装 docker，克隆仓库后进入仓库根目录，无需其他准备
+
+::: tabs#Docker-build
+
+@tab basic
+
+```bash
+docker build -t xhofe/alist:latest .
+```
+
+@tab with ffmpeg
+
+```bash
+docker build -t xhofe/alist:latest-ffmpeg --build-arg INSTALL_FFMPEG=true .
+```
+
+:::
+
 ## **有关离线下载功能的额外说明**
 
 若没有使用```docker pull --platform```参数拉取镜像时，docker可能会在64位操作系统上拉取32位镜像,这将可能导致离线下载功能即使在正常配置情况下也无法使用。
@@ -240,4 +263,4 @@ Q：我的版本是v3.x.x 怎么也升级不到最新版 `docker pull xhofe/alis
 A：原因是你的docker设置了镜像，从镜像更新不到最新版本，改一下/etc/docker/daemon.json，删除"registry-mirrors": ["镜像加速器地址"]
 
 - 删除若不行，可以考虑更换一个`镜像加速地址`
-- 或者简单粗暴：下载时将`xhofe/alist:latest` 替换为`xhofe/alist:v3.16.3`（指定版本，写教程时最新的是3.16.3）
+- 或者简单粗暴：下载时将`xhofe/alist:latest` 替换为`xhofe/alist:v3.16.3`（指定版本，写教程时最新的是3.16.3）