Committee discount with cooperative merchant

[dellamou]

Story point: 5

Context

We changed our membership card into a discount card and students no longer need to join CSSA to gain the discount. Now students can purchase a discount card for $5 and enjoying all the discount with our cooperative merchants. They can also choose to bind their card with their CSSA account, thus once they lose their card, they can reissue a card for free.

Definition of Done

• Build a new page of applying for a discount card.

• Add an optional feature "Binding My Card" in the personal profile page

• Create a linkage on the current "Discount merchants" page.
  If the user doesn't have a card, they can apply one (link to the applying page)
  If the user already have a card, they can choose to bind it with its CSSA account (link to the login page if the user haven't login, otherwise, link to its personal profile page)