- move the initialization of config/library/storage to mango.cr

- remove duplicate initialization of server in server.cr

src/mango.cr

@@ -1,4 +1,11 @@
 require "./server"
+require "./config"
+require "./library"
+require "./storage"
 
-server = Server.new
+config = Config.load
+library = Library.new config.library_path
+storage = Storage.new config.db_path
+
+server = Server.new config, library, storage
 server.start