title: i have a problem for npm start on a react app
body: <p>i have a clone from a big app on my system, after i ran <code>npm install</code>, this is my log:</p>
  <pre><code>arash_sh@Arashs-MacBook-Pro talentcoach-web % npm install
  npm WARN deprecated react-persian-calendar-date-picker@1.1.6: react-persian-calendar-datepicker is deprecated! please use the new react-modern-calendar-datepicker https://kiarash-z.github.io/react-modern-calendar-datepicker
  npm WARN deprecated @formatjs/intl-unified-numberformat@3.3.7: We have renamed the package to @formatjs/intl-numberformat
  npm WARN deprecated eslint-loader@2.2.1: This loader has been deprecated. Please use eslint-webpack-plugin
  npm WARN deprecated core-js@2.6.12: core-js@&lt;3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.
  npm WARN deprecated ant-design-palettes@1.1.3: Please use @ant-design/colors to replace ant-design-palettes
  npm WARN deprecated browserslist@2.11.3: Browserslist 2 could fail on reading Browserslist &gt;3.0 config used in other tools.
  npm WARN deprecated chokidar@2.1.8: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.
  npm WARN deprecated fsevents@1.2.13: fsevents 1 will break on node v14+ and could be using insecure binaries. Upgrade to fsevents 2.
  npm WARN deprecated browserslist@1.7.7: Browserslist 2 could fail on reading Browserslist &gt;3.0 config used in other tools.
  npm WARN deprecated core-js@1.2.7: core-js@&lt;3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.
  npm WARN deprecated circular-json@0.3.3: CircularJSON is in maintenance only, flatted is its successor.
  npm WARN deprecated kleur@2.0.2: Please upgrade to kleur@3 or migrate to 'ansi-colors' if you prefer the old syntax. Visit &lt;https://github.com/lukeed/kleur/releases/tag/v3.0.0\&gt; for migration path(s).
  npm WARN deprecated left-pad@1.3.0: use String.prototype.padStart()
  npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
  npm WARN deprecated request-promise-native@1.0.9: request-promise-native has been deprecated because it extends the now deprecated request package, see https://github.com/request/request/issues/3142
  npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
  npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
  npm WARN deprecated har-validator@5.1.5: this library is no longer supported
  
  &gt; fsevents@1.2.13 install /Users/arash_sh/Desktop/LDI/IranTalent/talentcoach-web/node_modules/fsevents
  &gt; node install.js
  
  No receipt for 'com.apple.pkg.CLTools_Executables' found at '/'.
  
  No receipt for 'com.apple.pkg.DeveloperToolsCLILeo' found at '/'.
  
  No receipt for 'com.apple.pkg.DeveloperToolsCLI' found at '/'.
  
  gyp: No Xcode or CLT version detected!
  gyp ERR! configure error 
  gyp ERR! stack Error: `gyp` failed with exit code: 1
  gyp ERR! stack     at ChildProcess.onCpExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:351:16)
  gyp ERR! stack     at ChildProcess.emit (events.js:314:20)
  gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:276:12)
  gyp ERR! System Darwin 19.6.0
  gyp ERR! command &quot;/usr/local/bin/node&quot; &quot;/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js&quot; &quot;rebuild&quot;
  gyp ERR! cwd /Users/arash_sh/Desktop/LDI/IranTalent/talentcoach-web/node_modules/fsevents
  gyp ERR! node -v v14.9.0
  gyp ERR! node-gyp -v v5.1.0
  gyp ERR! not ok 
  
  &gt; core-js@2.6.12 postinstall /Users/arash_sh/Desktop/LDI/IranTalent/talentcoach-web/node_modules/core-js
  &gt; node -e &quot;try{require('./postinstall')}catch(e){}&quot;
  
  Thank you for using core-js ( https://github.com/zloirock/core-js ) for polyfilling JavaScript standard library!
  
  The project needs your help! Please consider supporting of core-js on Open Collective or Patreon: 
  &gt; https://opencollective.com/core-js 
  &gt; https://www.patreon.com/zloirock 
  
  Also, the author of core-js ( https://github.com/zloirock ) is looking for a good job -)
  
  
  &gt; core-js-pure@3.8.2 postinstall /Users/arash_sh/Desktop/LDI/IranTalent/talentcoach-web/node_modules/core-js-pure
  &gt; node -e &quot;try{require('./postinstall')}catch(e){}&quot;
  
  
  &gt; core-js@3.8.2 postinstall /Users/arash_sh/Desktop/LDI/IranTalent/talentcoach-web/node_modules/react-app-polyfill/node_modules/core-js
  &gt; node -e &quot;try{require('./postinstall')}catch(e){}&quot;
  
  npm notice created a lockfile as package-lock.json. You should commit this file.
  npm WARN notsup Unsupported engine for react-lottie@1.2.3: wanted: {&quot;npm&quot;:&quot;^3.0.0&quot;} (current: {&quot;node&quot;:&quot;14.9.0&quot;,&quot;npm&quot;:&quot;6.14.8&quot;})
  npm WARN notsup Not compatible with your version of node/npm: react-lottie@1.2.3
  npm WARN slick-carousel@1.8.1 requires a peer of jquery@&gt;=1.8.0 but none is installed. You must install peer dependencies yourself.
  npm WARN eslint-config-react-app@2.1.0 requires a peer of babel-eslint@^7.2.3 but none is installed. You must install peer dependencies yourself.
  npm WARN eslint-config-react-app@2.1.0 requires a peer of eslint-plugin-jsx-a11y@^5.1.1 but none is installed. You must install peer dependencies yourself.
  
  added 2287 packages from 1103 contributors and audited 2291 packages in 110.296s
  
  79 packages are looking for funding
    run `npm fund` for details
  
  found 80 vulnerabilities (72 low, 3 moderate, 5 high)
    run `npm audit fix` to fix them, or `npm audit` for details
  </code></pre>
  <p>and after that when i ran <code>npm start</code> this is my log:</p>
  <pre><code>
  &gt; talentcoach-web@0.0.1 prestart /Users/arash_sh/Desktop/LDI/IranTalent/talentcoach-web
  &gt; yarn clean
  
  sh: yarn: command not found
  npm ERR! code ELIFECYCLE
  npm ERR! syscall spawn
  npm ERR! file sh
  npm ERR! errno ENOENT
  npm ERR! talentcoach-web@0.0.1 prestart: `yarn clean`
  npm ERR! spawn ENOENT
  npm ERR! 
  npm ERR! Failed at the talentcoach-web@0.0.1 prestart script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     /Users/arash_sh/.npm/_logs/2021-01-08T17_16_26_747Z-debug.log
  </code></pre>
  <p>i know project is on razzle.</p>