Add AIS ships to website

[minjunminji]

Description

• Resolves Add AIS Ships to website #652
• Adds an AIS ingest worker (src/website/scripts/aisstream-ingest.js) that connects to aisstream.io via WebSocket and stores the latest ship positions in MongoDB.
• Adds configuration for AISSTREAM_API_KEY, and related AIS env vars
• Prepares data for the website to independently fetch/display AIS ship positions instead of relying on satellite uploads.

Verification

• Set MONGODB_URI and AISSTREAM_API_KEY in src/website/.env.development.
• From src/website, ran node scripts/aisstream-ingest.js and confirmed it connects to wss://stream.aisstream.io/v0/stream without JSON parse errors.
• Confirmed new documents are written to the AISShips collection in MongoDB with ship positions.
• Loaded the website and confirmed AIS ships appear/are available where expected.

Resources

• Issue Add AIS Ships to website #652 — “Add AIS Ships to website”
• https://aisstream.io/

[fyang151]

what do you think about adding node scripts/aisstream-ingest.js as a script to package.json?. its a pretty minor qol improvement, so your call!

[minjunminji]

what do you think about adding node scripts/aisstream-ingest.js as a script to package.json?. its a pretty minor qol improvement, so your call!

Resolved, see be5d610

[fyang151]

LGTM!
This will require us to resolve some merge conflicts because I took 2 months to approve this.