Add canvas.js to test phaser

src/frontend/canvas.js

+import * from phaser;
+
+var scene = {
+    preload: preload,
+    create: create
+};
+
+var config = {
+    type: Phaser.AUTO,
+    width: 800,
+    height: 600,
+    scene: scene
+};
+
+var game = new Phaser.Game(config);
+
+function preload ()
+{
+    this.load.image('404', 'http://labs.phaser.io/assets/sprites/phaser3-logo.png')
+}
+function create ()
+{
+    this.add.image(300, 400, '404')
+}
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