مشکل در نصب react

سلام ببخشید با دستور npm install -g create-react-app
به این خطا میخورم کسی دلیلش میدونه؟

$ npm install -g create-react-app  
npm WARN npm npm does not support Node.js v15.2.1  
npm WARN npm You should probably upgrade to a newer version of node as we  
npm WARN npm can't make any promises that npm will work with this version.  
npm WARN npm Supported releases of Node.js are the latest release of 6, 8, 9, 10, 11, 12.  
npm WARN npm You can find the latest version at <https://nodejs.org/>  
npm ERR! code ENOTFOUND  
npm ERR! errno ENOTFOUND  
npm ERR! network request to <https://registry.npmjs.org/create-react-app> failed, reason: getaddrinfo ENOTFOUND registry.npmjs.org  
npm ERR! network This is a problem related to network connectivity.  
npm ERR! network In most cases you are behind a proxy or have bad network settings.  
npm ERR! network  
npm ERR! network If you are behind a proxy, please make sure that the  
npm ERR! network 'proxy' config is set properly. See: 'npm help config'

npm ERR! A complete log of this run can be found in:  
npm ERR! C:\\Users\\Reza\\AppData\\Roaming\\npm-cachelogs\\2020-11-26T115033411Z-debug.log