docs: add minimum nodejs version in docs

en/4x/api.md

@@ -9,6 +9,8 @@ redirect_from: "/4x/api.html"
 
   <h1>4.x API</h1>
 
+  {% include note.html content="Express 4.0 requires Node.js 0.10 or higher." %}
+
   {% include api/{{ page.lang }}/4x/express.md %}
   {% include api/{{ page.lang }}/4x/app.md %}
   {% include api/{{ page.lang }}/4x/req.md %}

en/5x/api.md

@@ -11,6 +11,8 @@ redirect_from: "/5x/api.html"
 
   {% include note.html content="This is early beta documentation that may be incomplete and is still under development." %}
 
+  {% include note.html content="Express 5.0 requires Node.js 18 or higher." %}
+
   {% include api/{{ page.lang }}/5x/express.md %}
   {% include api/{{ page.lang }}/5x/app.md %}
   {% include api/{{ page.lang }}/5x/req.md %}

en/starter/faq.md

@@ -90,4 +90,9 @@ If you have a specific file, use the `res.sendFile()` function.
 If you are serving many assets from a directory, use the `express.static()`
 middleware function.
 
+## What version of Node.js does Express require?
+
+* [Express 4.x](/{{ page.lang }}/4x/api.html) requires Node.js 0.10 or higher.
+* [Express 5.x](/{{ page.lang }}/5x/api.html) requires Node.js 18 or higher.
+
 ###  [Previous: More examples ](/{{ page.lang }}/starter/examples.html)

en/starter/installing.md

@@ -10,6 +10,9 @@ redirect_from: "/starter/installing.html"
 
 Assuming you've already installed [Node.js](https://nodejs.org/), create a directory to hold your application, and make that your working directory.
 
+* [Express 4.x](/{{ page.lang }}/4x/api.html) requires Node.js 0.10 or higher.
+* [Express 5.x](/{{ page.lang }}/5x/api.html) requires Node.js 18 or higher.
+
 ```console
 $ mkdir myapp
 $ cd myapp