cln: install clnrest dependencies

expose clnrest port to outside by default
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

lightningd/Dockerfile

@@ -143,6 +143,7 @@ COPY --from=clboss_builder /usr/bin/clboss /usr/bin/clboss
 COPY --from=builder /build/plugins/monitor/monitor.py /usr/local/src/plugins/monitor.py
 COPY --from=builder /usr/local/bin/summars /usr/local/src/plugins/summars
 COPY --from=vls_builder /usr/local/bin/remote_hsmd_socket /usr/libexec/c-lightning/remote_hsmd_socket
+COPY --from=builder /build/core-lightning/plugins/clnrest/requirements.txt /usr/local/src/plugins/clnrest_requirements.txt
 
 RUN addgroup -S lightning && adduser -S lightning -G lightning && \
     mkdir -p ${LIGHTNINGD_DATA} && \
@@ -172,6 +173,8 @@ RUN pip3 install \
       requests \
       packaging
 
+RUN pip3 install -r /usr/local/src/plugins/clnrest_requirements.txt
+
 HEALTHCHECK --interval=5s --timeout=10s --start-period=5s \
     CMD ["/healthcheck.sh"]