cmake version from debian-bullseye doesn't like ARM

so let's build the latest from src

dockerbuild/Dockerfile.debian-bullseye

@@ -2,7 +2,11 @@ FROM debian:bullseye-20191224
 
 ARG go_pkg_url
 
-RUN apt-get update && apt-get upgrade -y && apt-get -y install build-essential curl cmake ca-certificates devscripts dh-systemd
+RUN apt-get update && apt-get upgrade -y && apt-get -y install build-essential curl ca-certificates devscripts dh-systemd
+RUN curl -s -k -L https://github.com/Kitware/CMake/releases/download/v3.17.3/cmake-3.17.3.tar.gz -o cmake-3.17.3.tar.gz && tar -xzf cmake-3.17.3.tar.gz
+WORKDIR /cmake-3.17.3
+RUN ./bootstrap && make -j8 && make install
+WORKDIR /
 
 RUN curl -s -k $go_pkg_url -o go.tar.gz && \
     tar -C /usr/local -xzf go.tar.gz && \