Trust github.com in container, add in possible Jenkins userIDs

Docker/Dockerfile

@@ -18,6 +18,9 @@ ARG UID=1000
 ARG GID=1000
 RUN groupadd -f -g ${GID} docker && ( getent passwd ${UID} || useradd -ms /bin/bash ${USER} -u ${UID} -g ${GID} )
 
+# Add github.com as an SSH known host
+RUN ssh -o StrictHostKeyChecking=no -T git@github.com; cat ~/.ssh/known_hosts >> /etc/ssh/ssh_known_hosts
+
 # install ccache
 RUN mkdir -p /opt/ccache/bin && for prog in gcc g++ cc c++ cpp arm-none-eabi-c++ arm-none-eabi-cpp arm-none-eabi-gcc arm-none-eabi-g++; do ln -s /usr/bin/ccache /opt/ccache/bin/$(basename $prog); done
 ENV PATH /opt/ccache/bin:$PATH
@@ -44,4 +47,7 @@ RUN setcap 'CAP_NET_RAW+eip CAP_NET_ADMIN+eip' /usr/bin/tcpdump
 # Allow non-root to use gdb on processes (will need SYS_PTRACE capability when running the container)
 RUN setcap 'CAP_SYS_PTRACE+eip' /usr/bin/gdb
 
-USER ${UID}:${GID}
+# Add in Jenkins userID
+RUN for i in $(seq 1001 1010); do ( getent passwd ${i} || useradd -ms /bin/bash jenkins${i} -u ${i} -g ${GID} ); done
+
+USER ${UID}:${GID}

Docker/Dockerfile.cross-compiler

@@ -8,11 +8,4 @@ RUN DEBIAN_FRONTEND=noninteractive apt update && apt install -y apt-utils \
                     && apt install -y ${DEPS_TESTING} \
                     && apt clean -y && rm -rf /var/lib/apt/lists/*
 
-ARG JENKINS_UID=1009
-ARG JENKINS_GID=1010
-RUN groupadd -f -g ${JENKINS_GID} jenkins && ( getent passwd ${JENKINS_UID} || useradd -ms /bin/bash jenkins -u ${JENKINS_UID} -g ${JENKINS_GID} )
-
-# Add github.com as an SSH known host
-RUN ssh -o StrictHostKeyChecking=no -T git@github.com; cat ~/.ssh/known_hosts >> /etc/ssh/ssh_known_hosts
-
 USER docker