Bonus task: add a upload image input inside the account-details that uploads a file to the public/images/profile subfolder (also: create it!):

• Use type=“file” attribute on the <input>;
• Use multipart/form-data encoding type attribute on the <form> (Google it!);
• Inside the Flask route function:
  • Actually, Read The Fine Manual for this!
• Finally, add an <img> tag to display the profile photo on the user's account page when everything is done!