fix docker link

doc/doc_ch/installation.md

@@ -7,7 +7,7 @@ PaddleOCR 工作环境
 - glibc 2.23
 - cuDNN 7.6+ (GPU)
 
-建议使用我们提供的docker运行PaddleOCR，有关docker、nvidia-docker使用请参考[链接](https://docs.docker.com/get-started/)。
+建议使用我们提供的docker运行PaddleOCR，有关docker、nvidia-docker使用请参考[链接](https://www.runoob.com/docker/docker-tutorial.html/)。
 
 *如您希望使用 mac 或 windows直接运行预测代码，可以从第2步开始执行。*
 

doc/doc_en/installation_en.md

@@ -7,7 +7,7 @@ PaddleOCR working environment:
 - python3.7
 - glibc 2.23
 
-It is recommended to use the docker provided by us to run PaddleOCR, please refer to the use of docker [link](https://docs.docker.com/get-started/).
+It is recommended to use the docker provided by us to run PaddleOCR, please refer to the use of docker [link](https://www.runoob.com/docker/docker-tutorial.html/).
 
 *If you want to directly run the prediction code on mac or windows, you can start from step 2.*