add paddlepaddle-cpu installation method (#2188)

* Update paddlepaddle_install.md

* Update paddlepaddle_install_en.md

docs/installation/paddlepaddle_install.md

@@ -10,12 +10,15 @@
 **若您通过 Docker 安装**，请参考下述命令，使用飞桨官方 Docker 镜像，创建一个名为 `paddlex` 的容器，并将当前工作目录映射到容器内的 `/paddle` 目录：
 
 ```bash
-# 对于 gpu 用户
+# 对于 cpu 用户:
+nvidia-docker run --name paddlex -v $PWD:/paddle --shm-size=8G --network=host -it registry.baidubce.com/paddlepaddle/paddle:3.0.0b1 /bin/bash
+
+# 对于 gpu 用户:
 # CUDA11.8 用户
 nvidia-docker run --name paddlex -v $PWD:/paddle --shm-size=8G --network=host -it registry.baidubce.com/paddlepaddle/paddle:3.0.0b1-gpu-cuda11.8-cudnn8.6-trt8.5 /bin/bash
 
 # CUDA12.3 用户
-nvidia-docker run --name paddlex -v $PWD:/paddle  --shm-size=8G --network=host -it registry.baidubce.com/paddlepaddle/paddle:3.0.0b1-gpu-cuda12.3-cudnn9.0-trt8.6 /bin/bash
+nvidia-docker run --name paddlex -v $PWD:/paddle --shm-size=8G --network=host -it registry.baidubce.com/paddlepaddle/paddle:3.0.0b1-gpu-cuda12.3-cudnn9.0-trt8.6 /bin/bash
 ```
 注：更多飞桨官方 docker 镜像请参考[飞桨官网](https://www.paddlepaddle.org.cn/install/quick?docurl=/documentation/docs/zh/install/docker/linux-docker.html)。若您是 CUDA11.8 用户，请确保您的 Docker版本 >= 19.03；若您是 CUDA12.3 用户，请确保您的 Docker版本 >= 20.10。
 

docs/installation/paddlepaddle_install_en.md

@@ -8,7 +8,10 @@ When installing PaddlePaddle, you can choose to install it via Docker or pip.
 **If you choose to install via Docker**, please refer to the following commands to use the official PaddlePaddle Docker image to create a container named `paddlex` and map the current working directory to the `/paddle` directory inside the container:
 
 ```bash
-# For GPU users
+# For CPU users:
+nvidia-docker run --name paddlex -v $PWD:/paddle --shm-size=8G --network=host -it registry.baidubce.com/paddlepaddle/paddle:3.0.0b1 /bin/bash
+
+# For GPU users:
 # CUDA 11.8 users
 nvidia-docker run --name paddlex -v $PWD:/paddle --shm-size=8G --network=host -it registry.baidubce.com/paddlepaddle/paddle:3.0.0b1-gpu-cuda11.8-cudnn8.6-trt8.5 /bin/bash