add readme

front/src/utils/array.ts

@@ -1,5 +1,5 @@
-export function removeDuplicates(array: any[]) {
-    const unique: any[] = [];
+export function removeDuplicates(array: number[]) {
+    const unique: number[] = [];
     for (let i = 0; i < array.length; i++) {
         if (!unique.includes(array[i])) {
             unique.push(array[i]);