My App To Do List, help in expanding it .

My App To Do List, help in expanding it .

Hey Guys i recently sat and built this small app(more of a demo .. structural app) and now i wanna expand on the idea . Its a To Do list app . 

check the APP Link :  The APP

as of now ofcource you can see everytime you refresh , the task you entered is gone !!!

Check The Code Code :  The Code

Some of the things i would like to do is : 

1 Every Time a user logs in he should be able to add a task and the task should be saved in a database . (i don't mind learning PHP for this and SQL in the back end .)
2. There should be a login and logout screen . 


Long Term plans : 
 - I don't mind using external plugging and frameworks later on to make it a little more advanced and flashy ! , but for now , i just wanna keep it barebone simple . 

This is not exactly a coding question , but i would appreciate somebody telling me wht technologies i'd have to use to get this up and running ? 
i am open to use of any framework . 

Thank you . 

Gautam .