feat: use Next.js on demand revalidation

front/app/api/revalidate/route.ts

@@ -0,0 +1,19 @@
+import { NextRequest, NextResponse } from "next/server";
+import { revalidateTag } from "next/cache";
+
+export async function GET(request: NextRequest) {
+  const tag: any = request.nextUrl.searchParams.get("tag");
+  revalidateTag(tag);
+
+  return NextResponse.json(
+    { revalidated: true, now: Date.now() },
+    {
+      status: 200,
+      headers: {
+        "Access-Control-Allow-Origin": "*",
+        "Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS",
+        "Access-Control-Allow-Headers": "Content-Type, Authorization",
+      },
+    }
+  );
+}