define size in blog example

Author: dawsbot

readme.md

@@ -72,7 +72,8 @@ const glob = require('glob');
 
 glob('./*', (err, files) => {
  // files is an array of filenames.
- for(let file of files) {
+ for (let file of files) {
+ const size = fileBytes(file);
  console.log(`"${file}" is ${size} bytes`);
  }
 });