Add README.md

app.js

@@ -17,8 +17,10 @@
 const fs = require('fs');
 const zlib = require('zlib');
 
-const input = fs.createReadStream('style.css'); // Replace 'yourfile.js' with the name of your JS file
-const output = fs.createWriteStream('style.css.gzip'); // The output will be 'yourfile.js.gz'
+const fileName = "style.css";
+
+const input = fs.createReadStream(fileName); // Replace 'yourfile.js' with the name of your JS file
+const output = fs.createWriteStream(`${fileName}.gzip`); // The output will be 'yourfile.js.gz'
 
 input.pipe(zlib.createGzip()).pipe(output);