adding cors

server.cpp

@@ -1,4 +1,5 @@
 #include "crow.h"
+#include "crow/middlewares/cors.h"
 
 #include <driver.h>
 #include <statement.h>
@@ -17,7 +18,7 @@ void exiting(){
 
 int main()
 {
-	crow::SimpleApp app;
+	crow::App<crow::CORSHandler> app;
 
 	driver = get_driver_instance();
 	con = driver->connect(getenv("DBURL"),getenv("DBUSER"),getenv("DBPWD"));