create-react-app less-css-modulesの追加

   "scripts":{ 
      "build-css": "less-watch-compiler --run-once --main-file=index.less src/less src/css",
       "watch-css": "npm run build-css && less-watch-compiler --main-file=index.less src/less src/css"
    }    

   //    
   {
     loader: require.resolve('css-loader'),
     options: cssOptions
   },
   //    
   {
     loader: require.resolve('css-loader'),
     options: {
       importLoaders: 1,
       modules: true,
       localIdentName: "[name]__[local]___[hash:base64:5]"     //   css modules     
     },
   },
   //   webpack   less   ，   sass     
    const lessRegex = /\.less$/
    const lessModuleRegex = /\.module\.less$/ 
    oneOf:[
           ...,
           {
             test: lessRegex,
             use: getStyleLoaders(
               {
                 importLoaders: 2,
                 sourceMap: isEnvProduction
                   ? shouldUseSourceMap
                   : isEnvDevelopment,
               },
               'less-loader'
             )
           },
           {
             test: lessModuleRegex,
             use: getStyleLoaders(
               {
                 importLoaders: 2,
                 sourceMap: isEnvProduction
                   ? shouldUseSourceMap
                   : isEnvDevelopment,
                 modules: true,
                 getLocalIdent: getCSSModuleLocalIdent
               },
               'less-loader'
             ),
             sideEffects: true
           },
       ]