improved all devcontainer

.devcontainer/focal/Dockerfile

@@ -0,0 +1,18 @@
+FROM introlab3it/rtabmap:focal-deps
+
+RUN apt-get update && apt-get install -y sudo && \
+    apt-get clean && rm -rf /var/lib/apt/lists/
+
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=1000
+
+RUN set -ex && \
+    groupadd --gid ${USER_GID} ${USERNAME} && \
+    useradd --uid ${USER_UID} --gid ${USER_GID} -m ${USERNAME} && \
+    usermod -a -G sudo ${USERNAME} && \
+    echo "${USERNAME} ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/${USERNAME} && \
+    chmod 0440 /etc/sudoers.d/${USERNAME}
+
+RUN echo "source /usr/share/bash-completion/completions/git" >> /home/${USERNAME}/.bashrc
+RUN echo 'source /opt/ros/$ROS_DISTRO/setup.bash' >> /home/${USERNAME}/.bashrc