Before you ever board a hyperloop for a half-hour trip from San Francisco to L.A., it’s possible that the ultra-fast transit system might help deliver the things you buy. Hyperloop One, the Los Angeles-based startup that ran a demo near Las Vegas earlier this year, is working on cargo transportation on land—and it also wants to transform shipping ports. The underwater system would let cargo ships drop freight into massive hyperloop tunnels submerged 10 miles…