add exit if error fired

Author: Kotvizky

src/app.js

@@ -5,12 +5,14 @@ const { copyFileSync } = require('node:fs');
 
 if (process.argv.length !== 4) {
   console.error('Script accepts 2 arguments');
+  process.exit(0);
 }
 
 const [, , sourceFile, destinationFile] = process.argv;
 
 if (sourceFile === destinationFile) {
   console.error('Can`t copy to the same location');
+  process.exit(0);
 }
 
 try {