Add nodeinfo-http - a faster nodeinfo

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

sample-functions/nodeinfo-http/handler.js

@@ -0,0 +1,32 @@
+'use strict'
+let os = require('os');
+let fs = require('fs');
+const fsPromises = fs.promises
+let util = require('util');
+
+module.exports = async (event, context) => {
+  let content = event.body;
+
+  let res = await info(content)
+  return context
+    .status(200)
+    .succeed(res)
+}
+
+async function info(content, callback) {
+   let data = await fsPromises.readFile("/etc/hostname", "utf8")
+
+   let val  = "";
+   val += "Hostname: " + data +"\n";
+   val += "Platform: " + os.platform()+"\n";
+   val += "Arch: " + os.arch() + "\n";
+   val += "CPU count: " + os.cpus().length+ "\n";
+
+   val += "Uptime: " + os.uptime()+ "\n";
+
+   if (content && content.length && content.indexOf("verbose") > -1) {
+     val += util.inspect(os.cpus()) + "\n";
+     val += util.inspect(os.networkInterfaces())+ "\n"
+   }
+   return val
+};