Add steps to install CMake

Dockerfile

@@ -4,6 +4,27 @@ COPY st-stm32cubeclt_1.14.0_19471_20231121_1200_amd64.deb_bundle.sh /install.sh
 RUN apt update && apt upgrade
 RUN apt-get install -y libusb-1.0-0-dev
 
+# Install CMake using KitWare's APT repository (https://apt.kitware.com/)
+RUN apt-get update && \
+    apt-get install -y ca-certificates gpg wget
+
+# Download manual KitWare keyring so we can add their APT repo
+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
+
+RUN echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ jammy main' | tee /etc/apt/sources.list.d/kitware.list >/dev/null && \
+    apt-get update
+
+# remove manual KitWare keyring
+RUN test -f /usr/share/doc/kitware-archive-keyring/copyright || \
+    rm /usr/share/keyrings/kitware-archive-keyring.gpg
+
+# Install KitWare's keyring through APT
+RUN apt-get install -y kitware-archive-keyring
+
+# Install CMake
+RUN apt-get install -y cmake
+
 # Setup the timezone non-interactively so we don't need to in the install
 RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends tzdata