adjustment of node behaviour

@@ -7,7 +7,8 @@ module.exports = function (grunt) {
         copy: {
             dist: {
                 files:[
-                   {src: 'src/arcs_browser.js', dest: 'build/arcs_browser.js'}
+                    {src: 'src/arcs_browser.js', dest: 'build/arcs_browser.js'},
+                    {src: 'src/arcs_node.mjs', dest: 'build/arcs_node.mjs'}
                 ]
                 
             }            

@@ -10,7 +10,6 @@
     "author": "Jean-Yves Didier",
     "license": "GPL",
     "dependencies": {
-        "requirejs": "*",
         "tracking.js": "*",
         "three.js": "https://raw.githubusercontent.com/mrdoob/three.js/r68/build/three.min.js",
         "objloader" : "https://raw.githubusercontent.com/mrdoob/three.js/r68/examples/js/loaders/OBJLoader.js",

+{ "type": "module"}

+{ "type": "module"}

-#!/usr/bin/env node --experimental-modules --experimental-json modules
-
-import ARCS from './arcs.js';
-import application from './appli.json';
-var aap = new ARCS.Application();
-aap.import(application);
-aap.start();

+#!/usr/bin/env -S node --experimental-modules --experimental-json-modules
+
+import ARCS from './arcs.js';
+import process from 'process';
+import path from 'path';
+import fs from 'fs';
+//import application from './appli.json';
+
+function usage() {
+    let sp = process.argv[1].lastIndexOf(path.delimiter);
+    console.log("usage:");
+    console.log("\t",
+        process.argv[1],
+        "description.json"
+    );
+}
+
+if (process.argv.length < 3) {
+    usage();
+    process.exit(1);
+}
+
+
+var appDescription = fs.readFileSync(process.argv[2]);
+if (appDescription === '') {
+    console.error("File '"+process.argv[2]+"' is empty.");
+    process.exit(2);
+}
+
+var application = JSON.parse(appDescription);
+
+var aap = new ARCS.Application();
+aap.import(application);
+aap.start();