update ttl, use file based hashing to prevent stale data.

src/server/Master.ts

@@ -23,8 +23,25 @@ const server = http.createServer(app);
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 app.use(express.json());
-// Serve static files from the 'out' directory
-app.use(express.static(path.join(__dirname, "../../static")));
+app.use(
+  express.static(path.join(__dirname, "../../static"), {
+    maxAge: "1y", // Set max-age to 1 year for all static assets
+    setHeaders: (res, path) => {
+      // You can conditionally set different cache times based on file types
+      if (path.endsWith(".html")) {
+        // HTML files get shorter cache time
+        res.setHeader("Cache-Control", "public, max-age=60");
+      } else if (path.match(/\.(js|css|svg)$/)) {
+        // JS, CSS, SVG get long cache with immutable
+        res.setHeader("Cache-Control", "public, max-age=31536000, immutable");
+      } else if (path.match(/\.(bin|dat|exe|dll|so|dylib)$/)) {
+        // Binary files also get long cache with immutable
+        res.setHeader("Cache-Control", "public, max-age=31536000, immutable");
+      }
+      // Other file types use the default maxAge setting
+    },
+  }),
+);
 app.use(express.json());
 
 app.set("trust proxy", 3);