Rewrite btcprice from Clojure to Python FastAPI

Replace the Clojure Kit application with a Python FastAPI app that
produces identical HTML output. WebSocket proxy, Danish number
formatting, and HTMX integration all preserved.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile

@@ -4,25 +4,22 @@ WORKDIR /build
 COPY package.json package-lock.json ./
 RUN npm ci
 COPY resources/css/ resources/css/
-COPY src/ src/
+COPY app/ app/
 COPY tailwind.config.js ./
 RUN npm run css:build
 
-FROM clojure:temurin-21-tools-deps-alpine AS build
+FROM python:3.13-slim
 
-WORKDIR /build
-COPY deps.edn build.clj ./
-RUN clj -Sforce -P
-COPY . .
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app/ app/
+COPY resources/public/ resources/public/
 COPY --from=css /build/resources/public/css/output.css resources/public/css/output.css
-RUN clj -T:build all
-
-FROM eclipse-temurin:21-jre-alpine
-
-COPY --from=build /build/target/btcprice-standalone.jar /btcprice/btcprice-standalone.jar
 
 EXPOSE 4040
 ENV PORT=4040
 ENV BTCDATA_URL=http://btcdata:4101
 
-CMD ["java", "-jar", "/btcprice/btcprice-standalone.jar"]
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "4040"]