update: more clarifications

Author: iltgg

docs/Multirotor/Tutorials/First_Steps/1._Developer_Environment.md

@@ -111,6 +111,8 @@ You will need to generate some keys: [https://docs.github.com/en/authentication/
 
 Add them to your GitHub account: [https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account](https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account)
 
+These tutorials assume you will configure git and GitHub with SSH.
+
 ### Environment
 
 Open a terminal in the folder/directory where you store your code.

docs/Multirotor/Tutorials/First_Steps/3._Recommended_Tutorials.md

@@ -66,6 +66,8 @@ Read the basic concepts page to get familiar with basic drone concepts: [https:/
 
 We make heavy use of offboard control for our autonomy, specially we use ROS2 and the uXRCE-DDS interface, there are quite a few pages, but skim a few to get a feel for what we are working with: [https://docs.px4.io/main/en/ros/offboard_control.html](https://docs.px4.io/main/en/ros/offboard_control.html)
 
+In the container, PX4 has been setup in `/build/PX4-Autopilot`, and the `MicroXRCEAgent` has already been installed.
+
 Recommended "Tutorial": [https://docs.px4.io/main/en/ros2/offboard_control](https://docs.px4.io/main/en/ros2/offboard_control)
 
 - Follow the instructions to install