Move the Docker image build instructions to a nested README (#14)

README.md

@@ -108,22 +108,3 @@ ros2 launch exercise1-1 ur.launch.py
 
 This should open an RViz window with the UR visible. It should look like this:
 ![RViz-with-UR](./images/ur-launch.png)
-
-### Building the Docker Image
-
-**For the purposes of the workshop, please use the image provided in [the lastest release](https://github.com/moveit/roscon24/releases).**
-**Workshop attendees should skip these steps as they do not need to build the image if they use the provided release.**
-
-These steps are here for reference only to build the Docker image and are not requried for and should not be done for the workshop itself.
-
-Running the build script is a supported workshop activity.
-Please proceed with building the Docker image only if you are certain of your understanding and are prepared to handle potential issues that may arise.
-
-The build script requries `pv`: `sudo apt install pv`
-
-To build the image, use the `docker/build.sh` script:
-
-  1. `cd` into this repository.
-  2. `docker/build.sh`
-
-This will build the image, tag it as `roscon-2024-moveit2-workshop`, and save the image as a compressed tarball. The `docker/fetch` script can be used to uncompress and load this output.

docker/README.md

@@ -0,0 +1,18 @@
+### Building the Docker Image
+
+**For the purposes of the workshop, please use the image provided in [the lastest release](https://github.com/moveit/roscon24/releases).**
+**Workshop attendees should skip these steps as they do not need to build the image if they use the provided release.**
+
+These steps are here for reference only to build the Docker image and are not requried for and should not be done for the workshop itself.
+
+Running the build script is a supported workshop activity.
+Please proceed with building the Docker image only if you are certain of your understanding and are prepared to handle potential issues that may arise.
+
+The build script requries `pv`: `sudo apt install pv`
+
+To build the image, use the `docker/build.sh` script:
+
+  1. `cd` into this repository.
+  2. `docker/build.sh`
+
+This will build the image, tag it as `roscon-2024-moveit2-workshop`, and save the image as a compressed tarball. The `docker/fetch` script can be used to uncompress and load this output.