add: upload file

src/helper/file-handler.ts

@@ -0,0 +1,12 @@
+import * as path from 'path';
+
+export const editFileName = (req, file, callback) => {
+  const name = file.originalname.split('.')[0];
+  const fileExtName = path.extname(file.originalname);
+  // const fileExtName = 'asdasd';
+  const randomName = Array(4)
+    .fill(null)
+    .map(() => Math.round(Math.random() * 16).toString(16))
+    .join('');
+  callback(null, `${name}-${randomName}${fileExtName}`);
+};