cmake: Use static libs to speed up builds

example/http/server/small/CMakeLists.txt

@@ -16,4 +16,8 @@ add_executable (http-server-small
     http_server_small.cpp
 )
 
+target_link_libraries(http-server-small
+    lib-asio
+    lib-beast)
+
 set_property(TARGET http-server-small PROPERTY FOLDER "example-http-server")