solution

src/app.js

@@ -1 +1,45 @@
+/* eslint-disable no-console */
 'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const [, , sourceFile, destinationFile] = process.argv;
+
+function copyFile() {
+  if (!sourceFile || !destinationFile) {
+    console.error('Usage: node app.js <sourceFile> <destinationFile>');
+
+    return;
+  }
+
+  if (path.resolve(sourceFile) === path.resolve(destinationFile)) {
+    console.log('Source and destination are the same. Nothing to copy.');
+
+    return;
+  }
+
+  fs.readFile(sourceFile, (err, data) => {
+    if (err) {
+      console.error('Error reading source file:', err);
+
+      return;
+    }
+
+    fs.writeFile(destinationFile, data, (error) => {
+      if (error) {
+        console.error('Error writing to destination file:', err);
+
+        return;
+      }
+
+      console.log(`File copied from ${sourceFile} to ${destinationFile}`);
+    });
+  });
+}
+
+copyFile();
+
+module.exports = {
+  copyFile: copyFile,
+};