cache flame bg

sample/flame/css/core.css

@@ -1,6 +1,6 @@
 :root {
   --bgColor: #2d3436;
-  --bgImage: url("https://images.wallpaperscraft.com/image/single/leaf_plant_green_136967_2560x1440.jpg");
+  --bgImage: url("/theme/img/bg.jpeg");
   --accentColor: #FFA500;
   --foreground: #ffffff;
 }

tools/screenshot/app.js

@@ -36,16 +36,14 @@ const sleep = ms => new Promise(r => setTimeout(r, ms));
     const themes = getDirectories("../../sample");
     for (const theme of themes) {
         replaceFiles(`../../sample/${theme}`, '../../src/data');
-        await sleep(500);
+        await sleep(2000);
 
         const page = await browser.newPage();
         await page.goto('http://localhost:7001');
         await page.waitForNetworkIdle();
-        await sleep(500);
+        await sleep(1000);
         await page.screenshot({ path: `../../docs/screenshots/${theme}.png` });
         await page.close();
-
-        await sleep(1000);
     }
 
     browser.close();