diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1fa9258..806919b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,18 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_COMPILER "/usr/bin/g++-12")
 set(CMAKE_PREFIX_PATH "/usr")
 
+# Set default build type if not specified
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE Release)
+endif()
+
+# Set compiler flags based on build type
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+    add_compile_options(-g)
+else()
+    add_compile_options(-O2)
+endif()
+
 add_executable(${PROJECT_NAME}
     src/main.cpp
     src/broadcast.h src/broadcast.cpp
diff --git a/src/app.cpp b/src/app.cpp
index ea3cf16..8507567 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -61,7 +61,7 @@ App::~App() {
 void App::setMetaTags() {
     removeMetaHeader(Wt::MetaHeaderType::Meta, "robots");
     addMetaHeader("keywords", "chat,single chat,images,no registration,anonymous,direct chat,search,searchable,international,free,no cost,private chat,private");
-    addMetaHeader(Wt::MetaHeaderType::Meta, "robots", "");
+    addMetaHeader(Wt::MetaHeaderType::Meta, "robots", "index,nofollow");
     addMetaHeader(Wt::MetaHeaderType::Meta, "google-adsense-account", "ca-pub-1104166651501135");
 }