Server generates a version number based on package.json as well as the current git branch and hash value.

server.js

+const package = require("./package.json");
+
+const exec = require('child_process').execSync;
+
 const fs = require("fs");
 const path = require("path");
 const express = require("express");
 const app = express();
 var port = 8000;
 
+
+function GenVersion(){
+  var v = package.version;
+  // Testing for a GIT repo.
+  try{
+    var res = exec("git rev-parse --abbrev-ref HEAD").toString();
+    v += "-[" + res.trim();
+
+    res = exec("git rev-parse HEAD").toString();
+    v += ":" + res.substring(0, 5) + "]";
+  } catch(e) {
+    if (v !== package.version){
+      v += "]"; // If v doesn't match package.version, then assume that the first git call worked.
+    }
+  }
+
+  return v;
+}
+var version = GenVersion();
+
 app.set('views', path.join(__dirname, "/views"));
 app.engine('html', require('ejs').renderFile);
 app.set('view engine', 'html');
 app.use("/app", express.static(path.join(__dirname, "/app")));
 app.get('/', function(req, res){
-  res.render('index.html');
+  res.render('index.html', {version:version});
 });
 
-app.listen(port, () => console.log("NESPaint listening on port " + port + "!"));
+app.listen(port, () => {
+  console.log("NESPaint (v" + version + ") listening on port " + port + "!");
+});