Ensure we use latest cmake version

Dockerfile

@@ -29,6 +29,16 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
 FROM base as build
 ARG DEBIAN_FRONTEND=noninteractive
 
+RUN apt-get update && apt-get install ca-certificates gpg wget
+
+RUN test -f /usr/share/doc/kitware-archive-keyring/copyright || \
+	wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - \
+	| tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null
+
+# Ensure we are using latest cmake
+RUN echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ focal main' \
+	| tee /etc/apt/sources.list.d/kitware.list >/dev/null
+
 RUN apt-get update && apt-get install --no-install-recommends -y \
   git cmake build-essential ca-certificates pkg-config \
   libssl-dev \