fix(ci): use internal registry for node:20-alpine base image

- Change FROM node:20-alpine to FROM registry.nxtgauge.com/node:20-alpine
- Update both Dockerfile and Dockerfile.simple
- Fixes Docker Hub rate limiting errors in Woodpecker builds

Dockerfile

@@ -27,7 +27,7 @@ ENV NODE_OPTIONS="--max-old-space-size=4096"
 RUN npm run build
 
 # Runtime stage
-FROM node:20-alpine
+FROM registry.nxtgauge.com/node:20-alpine
 WORKDIR /app
 
 # Copy built output

Dockerfile.simple

@@ -1,4 +1,4 @@
-FROM node:20-alpine
+FROM registry.nxtgauge.com/node:20-alpine
 
 WORKDIR /app
 

screenshot.ts

@@ -0,0 +1,35 @@
+import { chromium } from 'playwright';
+
+async function takeNxtgaugeScreenshot() {
+  const browser = await chromium.launch({ headless: true });
+  const page = await browser.newPage();
+  page.setViewportSize({ width: 1440, height: 900 });
+  
+  console.log('Navigating to nxtgauge admin...');
+  await page.goto('http://localhost:3000/admin', { waitUntil: 'load' });
+  await page.waitForTimeout(5000);
+  
+  // Take screenshot
+  console.log('Taking screenshot...');
+  await page.screenshot({ path: '/tmp/nxtgauge-admin.png', fullPage: true });
+  
+  // Get sidebar structure info
+  const sidebarInfo = await page.evaluate(() => {
+    const sidebar = document.querySelector('aside');
+    if (sidebar) {
+      const styles = window.getComputedStyle(sidebar);
+      return {
+        width: styles.width,
+        background: styles.background,
+        borderRight: styles.borderRight,
+      };
+    }
+    return 'not found';
+  });
+  console.log('Sidebar styles:', sidebarInfo);
+  
+  await browser.close();
+  console.log('Screenshot saved');
+}
+
+takeNxtgaugeScreenshot().catch(console.error);