Fix dockerfile for arm32/64

contrib/linuxarm32v7.Dockerfile

@@ -48,7 +48,7 @@ RUN mkdir /opt/litecoin && cd /opt/litecoin \
 FROM debian:buster-slim as builder
 
 ENV LIGHTNINGD_VERSION=master
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential gettext git libtool python3 python3-mako wget gnupg dirmngr git \
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential gettext git libtool python3 python3-pip python3-setuptools python3-mako wget gnupg dirmngr git \
   libc6-armhf-cross gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf
 
 ENV target_host=arm-linux-gnueabihf
@@ -92,6 +92,7 @@ RUN git clone --recursive /tmp/lightning . && \
 
 ARG DEVELOPER=0
 ENV PYTHON_VERSION=3
+RUN pip3 install mrkd
 RUN ./configure --prefix=/tmp/lightning_install --enable-static && make -j3 DEVELOPER=${DEVELOPER} && make install
 
 FROM arm32v7/debian:buster-slim as final

contrib/linuxarm64v8.Dockerfile

@@ -48,7 +48,7 @@ RUN mkdir /opt/litecoin && cd /opt/litecoin \
 FROM debian:buster-slim as builder
 
 ENV LIGHTNINGD_VERSION=master
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential gettext git libtool python3 python3-mako wget gnupg dirmngr git \
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential gettext git libtool python3 python3-pip python3-setuptools python3-mako wget gnupg dirmngr git \
   libc6-arm64-cross gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
 
 ENV target_host=aarch64-linux-gnu
@@ -91,6 +91,7 @@ RUN git clone --recursive /tmp/lightning . && \
 
 ARG DEVELOPER=0
 ENV PYTHON_VERSION=3
+RUN pip3 install mrkd
 RUN ./configure --prefix=/tmp/lightning_install --enable-static && make -j3 DEVELOPER=${DEVELOPER} && make install
 
 FROM arm64v8/debian:buster-slim as final