npm配置文件：

metrics-registry = "https://registry.npmmirror.com/"

canvas_binary_host_mirror = "https://registry.npmmirror.com/-/binary/canvas/"

chromedriver_cdnurl = "https://registry.npmmirror.com/-/binary/chromedriver/"

electron_builder_binaries_mirror = "https://registry.npmmirror.com/-/binary/electron-builder-binaries/"

electron_mirror = "https://registry.npmmirror.com/-/binary/electron/"

nodejs_org_mirror = "https://registry.npmmirror.com/-/binary/node/"

registry = "https://registry.npmmirror.com/"

sass_binary_site = "https://registry.npmmirror.com/-/binary/node-sass"

安装canvas@2.11.2时候 ，二进制安装不了，需要源码编译，node-pre-gyp install --fallback-to-build --update-binary【此参数是二进制安装不成功，转向源码编译了, windows 下除了python 环境还得需要visual studio环境】

编译源码需要python2.7的环境。源码编译的时候需要 @babel/core@7.4.0，原来package.json 里面配置的是 @babel/core@7.4.0的版本，需要升级

npm i @babel/core@7.4.0 --unsafe-perm

npm linux下默认www权限，所以root账号下编译时候需要创建的临时目录没有权限，所以后面要加上 --unsafe-perm 参数。

如果还是不行显示使用 npm install --build-from-source canvas  从源码编译

原先编译报错信息如下：

> canvas@2.11.2 install /data/project_deploy/zsztmonitor/zhitongweb/web/node_modules/canvas

> node-pre-gyp install --fallback-to-build --update-binary

node-pre-gyp WARN Pre-built binaries not installable for canvas@2.11.2 and node@14.15.1 (node-v83 ABI, glibc) (falling back to source compile with node-gyp) 

node-pre-gyp WARN Hit error EACCES: permission denied, mkdir '/data/project_deploy/zsztmonitor/zhitongweb/web/node_modules/canvas/build' 

gyp WARN EACCES current user ("www") does not have permission to access the dev dir "/root/.cache/node-gyp/14.15.1"