Remove DB, Binance WebSocket, and Kraken pollers from btcprice.
UI now uses vanilla EventSource connecting to btcdata for live
price updates. btcprice is now a pure UI service with no database.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Switch to available base images (temurin-21) since clojure:openjdk-25
and azul/zulu-openjdk-alpine:25 no longer exist. Add docker-compose.yml
for single-command app deployment.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>