feat: render image in background

app/components/Background.vue

@@ -1,8 +1,13 @@
 <script lang="ts" setup>
+const backgroundImage = useTemplateRef("backgroundImage");
+
 useRender((ctx) => {
-  ctx.fillStyle = "green";
-  ctx.fillRect(0, 0, 100, 100);
+  if (!backgroundImage.value) return;
+
+  ctx.drawImage(backgroundImage.value, 0, 0);
 });
 </script>
 
-<template></template>
+<template>
+  <img ref="backgroundImage" src="/assets/background.png" hidden />
+</template>