add frontend endpoint

Author: devcom33

backend/src/main/java/org/heymouad/focusapp/config/SecurityConfig.java

@@ -55,7 +55,8 @@ public CorsConfigurationSource corsConfigurationSource() {
         configuration.setAllowedOrigins(List.of(
                 "http://localhost:3000",
                 "http://localhost:4173",
-                "http://localhost:5173"
+                "http://localhost:5173",
+                "https://habitflow-gold.vercel.app"
         ));
         configuration.setAllowCredentials(true);
         configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS", "PATCH"));