short update

Author: timzarhansen

Linux_ROS/Docker.md

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+---
+layout: default
+title: Docker
+parent: Linux and ROS Overview
+nav_order: 3
+---
+
+# Docker usage
+
+Instead of installing every peace of software 1 by 1, we decided to take a dockers-approach.
+The setup is done on Mac, but on Linux machines everything should be easier.
+
+The idea is, that a devcontainer is used for the ROS2 setup together with its packages that are imporant.
+
+
+
+

Linux_ROS/commands.md

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+---
+layout: default
+title: Commands
+parent: Linux and ROS Overview
+nav_order: 4
+---
+
+This is a list of useful commands:
+
+
+
+```
+sudo rm -r install/* build/* log/*
+
+colcon build --symlink-install --cmake-args -DCMAKE_BUILD_TYPE=Release
+```