assets: make them work for the app directory

__init__.py

@@ -8,6 +8,11 @@ class NyanCat(Application):
         super().__init__(app_ctx)
         self.picidx: int = 0; 
 
+        try:
+            self.bundle_path = app_ctx.bundle_path
+        except:
+            self.bundle_path = "/flash/sys/apps/chubbson-nyan-cat"
+
     def draw(self, ctx: Context) -> None:
         # Paint the background black
         ctx.rgb(0, 0, 0).rectangle(-120, -120, 240, 240).fill()
@@ -41,7 +46,7 @@ class NyanCat(Application):
         leds.update()
 
     def nextImage(self, ctx: Context):
-        path = f"/flash/sys/apps/nyan-cat/cbimage{str(self.picidx)}_240.png"
+        path = f"{self.bundle_path}/cbimage{str(self.picidx)}_240.png"
         self.picidx = self.picidx + 1
         if self.picidx > 11:
            self.picidx = 0