update pymesh package and dockerfile for python3.9

Author: HydrogenSulfate

docker/Dockerfile

@@ -42,7 +42,7 @@ RUN cd /src && \
     ls /src && \
     tar -xvf pymesh.tar.xz && \
     cd pymesh && \
-    python3 setup.py install && \
+    python3 setup.py install --user && \
     rm -rf /src
 
 ENV PATH="$PATH:/usr/lib/x86_64-linux-gnu/"

docs/zh/install_setup.md

@@ -107,7 +107,7 @@ pybind11、pysdf、PyMesh 四个依赖库（上述**1.1 从 docker 镜像启动*
     如未安装，可按照下列命令下载、解压 cmake 包，并添加到 `PATH` 变量中即可完成安装。
 
     ``` sh
-    wget -nc https://cmake.org/files/v3.23/cmake-3.23.0-linux-x86_64.tar.gz
+    wget -nc https://paddle-org.bj.bcebos.com/paddlescience/cmake-3.23.0-linux-x86_64.tar.gz
     tar -zxvf cmake-3.23.0-linux-x86_64.tar.gz
     rm -f cmake-3.23.0-linux-x86_64.tar.gz
     PATH=$PWD/cmake-3.23.0-linux-x86_64/bin:$PATH