Properly destroy PIXI Application after bitmap generation

package.json

@@ -1,6 +1,6 @@
 {
   "name": "card-printing-worker",
-  "version": "1.5.1",
+  "version": "1.6.0",
   "description": "Printing Worker for Leosac Credential Provisioning solution",
   "main": "src/run.js",
   "scripts": {
@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/leosac/card-printing-worker#readme",
   "dependencies": {
-    "@leosac/cardrendering": "^1.6.2",
+    "@leosac/cardrendering": "^1.7.2",
     "@pixi/node": "7.1.3",
     "body-parser": "^1.20.2",
     "canvas": "^2.11.0",

src/services/RenderService.js

@@ -28,7 +28,11 @@ class RenderService {
     async generateImage(layout, sidetpl, data) {
         this.logger.info("Generating image...");
 
-        const app = new PIXI.Application();
+        const app = new PIXI.Application({
+            antialias: true,
+            autoDensity: true,
+            resolution: 1
+        });
         const cr = new CardRenderer({
             renderer: app.renderer,
             stage: app.stage,
@@ -49,8 +53,14 @@ class RenderService {
             await cr.setCardData(data);
         }
         cr.animate();
-
+        
         const base64img = app.renderer.extract.canvas(app.stage).toDataURL('image/png');
+
+        app.stop();
+        cr.graphics.renderer = undefined; // to avoid rendering on animate function
+        cr.graphics.card = undefined;
+        app.destroy(true, { children: true, texture: false, baseTexture: false });
+
         return this.dataURItoBlob(base64img);
     }
 }