doc: sending http request to localhost to avoid https redirect

In the JSON fetching example, http.get request is being sent to
an http url that redirects to https. This causes the http.get
request to fail. To avoid redirect errors, a local http server
is set up that returns a json response.

Fixes: #37907

PR-URL: #38036
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Nitzan Uziely <linkgoron@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: hassaanp

doc/api/http.md

@@ -2720,7 +2720,7 @@ The `callback` is invoked with a single argument that is an instance of
 JSON fetching example:
 
 ```js
-http.get('http://nodejs.org/dist/index.json', (res) => {
+http.get('http://localhost:8000/', (res) => {
   const { statusCode } = res;
   const contentType = res.headers['content-type'];
 
@@ -2755,6 +2755,16 @@ http.get('http://nodejs.org/dist/index.json', (res) => {
 }).on('error', (e) => {
   console.error(`Got error: ${e.message}`);
 });
+
+// Create a local server to receive data from
+const server = http.createServer((req, res) => {
+  res.writeHead(200, { 'Content-Type': 'application/json' });
+  res.end(JSON.stringify({
+    data: 'Hello World!'
+  }));
+});
+
+server.listen(8000);
 ```
 
 ## `http.globalAgent`