code: function createCacheOptions () {
      const values = {
        'gridsome': require('../../package.json').version,
        'cache-loader': require('cache-loader/package.json').version,
        'vue-loader': require('vue-loader/package.json').version,
        context: app.context,
        isProd,
        isServer,
        config: (
          (projectConfig.chainWebpack || '').toString()
        )
      }
  
      return {
        cacheDirectory: app.resolve('node_modules/.cache/gridsome'),
        cacheIdentifier: hash(values)
      }
    }
docs: helpes