Create basic requirement list

Core functionality

• We should be able to deny access to a member without having access to their card
• We should be able to handle an arbitrary number of doors
• We should be able to handle access to equipment (laser, 3D printer)
• Programming a card for a new member should be easy

Security

• A database dump will not allow to craft new keys
• A database dump will not allow user impersonation
• Physical access to the controller will not allow crafting new keys (buy may allow opening the door)
• Physical access to the external part (PN532 reader and button) will not allow opening the door

Robustness

• The system should work if internet is down
• The system should work if internal network is down
• The system should work if power is down (fallback to physical key or battery backup)