Add Fingerprint for Next.js

plugins/next_js.rb

@@ -0,0 +1,17 @@
+Plugin.define do
+  name "Next.js"
+  authors [
+    "Ostorlab",
+  ]
+  version "0.1"
+  description "Next.js is an open-source web development framework created by the private company Vercel providing React-based web applications with server-side rendering and static rendering. "
+  website "https://nextjs.org/"
+
+  matches [
+    {
+      :search => "headers[x-powered-by]",
+      :regexp => /Next\.js/,
+      :name => "x-powered-by header with Next.js"
+    }
+  ]
+end