Update nginx.conf

nginx.conf

@@ -1,15 +1,26 @@
-  server {
-      listen 8080;
-      server_name localhost;
-      root /app;
-      index index.html;
-
-      location / {
-          try_files /index.html =404;
-      }
-
-      # Optional: Basic Security Headers
-      add_header X-Content-Type-Options nosniff;
-      add_header X-Frame-Options DENY;
-      add_header Referrer-Policy no-referrer;
-  }
+ server {
+    listen 8080;
+    server_name localhost;
+    root /app;
+    index index.html;
+
+    add_header X-Content-Type-Options nosniff;
+    add_header X-Frame-Options DENY;
+    add_header Referrer-Policy no-referrer;
+
+    # Serve the maintenance page with a 503 status
+    location / {
+        return 503;
+    }
+
+    # Define the error page for 503 errors
+    error_page 503 /index.html;
+
+    # Serve the maintenance page content
+    location = /index.html {
+        root /app;
+    }
+
+    access_log /dev/stdout;
+    error_log /dev/stderr;
+}