diff --git a/src/app.js b/src/app.js
index ad9a93a..33c2436 100644
--- a/src/app.js
+++ b/src/app.js
@@ -1 +1,41 @@
+/* eslint-disable no-console */
 'use strict';
+
+const [source, dest] = process.argv.slice(2);
+const fs = require('fs');
+const path = require('path');
+
+if (!source || !dest) {
+  console.error('Missing source or destination file path.');
+  process.exit(0);
+}
+
+const sourcePath = path.resolve(source);
+const destPath = path.resolve(dest);
+
+if (sourcePath === destPath) {
+  process.exit(0);
+}
+
+if (!fs.existsSync(sourcePath)) {
+  console.error(`Source file does not exist: ${sourcePath}`);
+  process.exit(0);
+}
+
+if (fs.statSync(sourcePath).isDirectory()) {
+  console.error(`Source file is a directory: ${sourcePath}`);
+  process.exit(0);
+}
+
+if (fs.existsSync(destPath) && fs.statSync(destPath).isDirectory()) {
+  console.error(`Destination file is a directory: ${destPath}`);
+  process.exit(0);
+}
+
+fs.copyFile(sourcePath, destPath, (err) => {
+  if (err) {
+    console.error(`Error copying file from ${sourcePath} to ${destPath}:`, err);
+    process.exit(0);
+  }
+  console.log(`File copied from ${sourcePath} to ${destPath} successfully.`);
+});