Add DBD card deck to copi.owasp.org

[SachinAditya]

Add support for the DBD card deck in copi.owasp.org.

Tasks:

• Copy dbd-cards-1.0-en.yaml into copi.owasp.org/priv/repo/cornucopia
• Create migration similar to populate_eop_cards.exs
• Add graphics from digitalbenefits deck
• Add CSS in assets/css/cards.scss
• Add “Need more info?” link for each card pointing to the URL from YAML
• Add card template logic inside show.html.heex
• Update card_migration.ex if required

[SachinAditya]

I would like to work on this issue.

[sydseter]

@SachinAditya I have assigned you.