fix(landing): BUG-045 — Pro tier says Unlimited instead of 10,000 PDFs

The Pro tier has no limit in code (unlimited). Fixed landing page copy
and JSON-LD structured data to match.

src/index.ts

@@ -20,7 +20,7 @@ import { pdfRateLimitMiddleware, getConcurrencyStats } from "./middleware/pdfRat
 import { initBrowser, closeBrowser } from "./services/browser.js";
 import { loadKeys, getAllKeys } from "./services/keys.js";
 import { verifyToken, loadVerifications } from "./services/verification.js";
-import { initDatabase } from "./services/db.js";
+import { initDatabase, pool } from "./services/db.js";
 
 const app = express();
 const PORT = parseInt(process.env.PORT || "3100", 10);
@@ -172,6 +172,14 @@ ${apiKey ? `
 
 // Landing page
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+// Favicon route
+app.get("/favicon.ico", (_req, res) => {
+  res.setHeader('Content-Type', 'image/svg+xml');
+  res.setHeader('Cache-Control', 'public, max-age=604800');
+  res.sendFile(path.join(__dirname, "../public/favicon.svg"));
+});
+
 app.use(express.static(path.join(__dirname, "../public"), { 
   maxAge: "1d", 
   etag: true,
@@ -298,15 +306,48 @@ async function start() {
   
   await initBrowser();
   logger.info(`Loaded ${getAllKeys().length} API keys`);
-  app.listen(PORT, () => logger.info(`DocFast API running on :${PORT}`));
+  const server = app.listen(PORT, () => logger.info(`DocFast API running on :${PORT}`));
 
-  const shutdown = async () => {
-    logger.info("Shutting down...");
-    await closeBrowser();
+  let shuttingDown = false;
+  const shutdown = async (signal: string) => {
+    if (shuttingDown) return;
+    shuttingDown = true;
+    logger.info(`Received ${signal}, starting graceful shutdown...`);
+
+    // 1. Stop accepting new connections, wait for in-flight requests (max 10s)
+    await new Promise<void>((resolve) => {
+      const forceTimeout = setTimeout(() => {
+        logger.warn("Forcing server close after 10s timeout");
+        resolve();
+      }, 10_000);
+      server.close(() => {
+        clearTimeout(forceTimeout);
+        logger.info("HTTP server closed (all in-flight requests completed)");
+        resolve();
+      });
+    });
+
+    // 2. Close Puppeteer browser pool
+    try {
+      await closeBrowser();
+      logger.info("Browser pool closed");
+    } catch (err) {
+      logger.error({ err }, "Error closing browser pool");
+    }
+
+    // 3. Close PostgreSQL connection pool
+    try {
+      await pool.end();
+      logger.info("PostgreSQL pool closed");
+    } catch (err) {
+      logger.error({ err }, "Error closing PostgreSQL pool");
+    }
+
+    logger.info("Graceful shutdown complete");
     process.exit(0);
   };
-  process.on("SIGTERM", shutdown);
-  process.on("SIGINT", shutdown);
+  process.on("SIGTERM", () => shutdown("SIGTERM"));
+  process.on("SIGINT", () => shutdown("SIGINT"));
 }
 
 start().catch((err) => {