docs: update readme

README.md

@@ -3,3 +3,21 @@
 
 This package implements Inverse Perspective Mapping for the [ROS 2](https://docs.ros.org/en/foxy/index.html) soccer project using Python.
 
+## Dependencies
+For running the IPM function, this package needs the humanoid base footprint package and IPM.
+```
+git clone ${ros2-ws}/src/ipm https://github.com/ros-sports/ipm.git
+git clone ${ros2-ws}/src/humanoid_base_footprint https://github.com/ros-sports/humanoid_base_footprint.git
+```
+Then, those packages needs biped_interfaces, rotation conversion library, and vision_msgs
+```
+git clone ${ros2-ws}/src/biped_interfaces https://github.com/ros-sports/biped_interfaces.git
+git clone ${ros2-ws}/src/rot_conv_lib https://github.com/AIS-Bonn/rot_conv_lib.git
+git clone ${ros2-ws}/src/vision_msgs https://github.com/ros-perception/vision_msgs
+```
+
+## Build
+```
+source /opt/ros/${ros-distro}/setup.bash
+colcon build --packages-up-to gyakuenki
+```