fix: 添加安卓容器安装apk文件的说明

Author: spiritLHLS

docs/en/guide/docker/docker_android.md

@@ -54,4 +54,10 @@ rm -rf /etc/nginx/sites-enabled/reverse-proxy
 rm -rf /etc/nginx/sites-available/reverse-proxy
 rm -rf /etc/nginx/passwd_scrcpy_web
 rm -rf /root/android_info
-```
+```
+
+## Install the APK file
+
+Click ```list files``` to open the file directory, switch to the ```/storage/emulated/0/Download``` directory, drag and drop the ```apk``` into it to install it, and wait for the progress to finish running, and the apk will be uploaded to the Android container.
+
+At this point, go back to the Android interface, open the file manager, it will show the file you just uploaded, click on it to install.

docs/guide/docker/docker_android.md

@@ -62,3 +62,9 @@ rm -rf /etc/nginx/sites-available/reverse-proxy
 rm -rf /etc/nginx/passwd_scrcpy_web
 rm -rf /root/android_info
 ```
+
+## 安装APK文件
+
+点击```list files```打开文件目录，切换到```/storage/emulated/0/Download```目录，把```apk```拖拽进来进行安装，等待进度跑完，apk就上传到安卓容器里面了。
+
+此时回到安卓的界面，打开文件管理器，就会显示你刚上传的文件，点击后可进行安装。