bundle signet miner inside the image. requires python

Dockerfile

@@ -79,13 +79,19 @@ RUN make -C ./build install
 
 FROM alpine:3.20 AS final
 
+ARG KNOTS_VERSION
+
 COPY --from=builder /usr/local/bin/* /usr/local/bin/
+COPY --from=builder /tmp/bitcoin-${KNOTS_VERSION}/test/functional/test_framework /opt/bitcoin/test/functional/test_framework
+COPY --from=builder /tmp/bitcoin-${KNOTS_VERSION}/contrib/signet/miner           /opt/bitcoin/contrib/signet/miner
 
 RUN apk add --no-cache \
+    python3 \
     tor \
  && adduser -D bitcoin \
  && mkdir /home/bitcoin/.bitcoin \
- && chown bitcoin:bitcoin /home/bitcoin/.bitcoin
+ && chown bitcoin:bitcoin /home/bitcoin/.bitcoin \
+ && ln -s /opt/bitcoin/contrib/signet/miner /usr/local/bin/miner
 
 USER bitcoin