feat(nestjs): migrate to NestJS

packages/server/src/utils/accum-sum.ts

@@ -0,0 +1,7 @@
+
+export const accumSum = (data: any[], callback: (data: any) => number): number => {
+  return data.reduce((acc, _data) => {
+    const amount = callback(_data);
+    return acc + amount;
+  }, 0);
+};