Document how to contribute and do development in the README

README.md

@@ -53,3 +53,19 @@ If you want to port a program to Orbital, see below:
 - If the program is written in Rust probably it works on Orbital because the `winit` crate is used in most places, but there are programs that access X11 or Wayland directly. You need to port these programs to `winit` and merge on upstream.
 
 - If the program is written in C or C++ and access X11 or Wayland directly, it must be ported to the [Orbital library](https://gitlab.redox-os.org/redox-os/liborbital).
+
+## How To Contribute
+
+To learn how to contribute to this system component you need to read the following document:
+
+- [CONTRIBUTING.md](https://gitlab.redox-os.org/redox-os/redox/-/blob/master/CONTRIBUTING.md)
+
+## Development
+
+To learn how to do development with this system component inside the Redox build system you need to read the [Build System](https://doc.redox-os.org/book/build-system-reference.html) and [Coding and Building](https://doc.redox-os.org/book/coding-and-building.html) pages.
+
+### How To Build
+
+To build this system component you need to download the Redox build system, you can learn how to do it on the [Building Redox](https://doc.redox-os.org/book/podman-build.html) page.
+
+This is necessary because they only work with cross-compilation to a Redox virtual machine, but you can do some testing from Linux.