(doc) Add version and system requirements

README.adoc

@@ -19,6 +19,8 @@ image::synoptique_application_topo.png[Topology,350]
 The built system will sit in the PS (ARM) part of a Xilinx SoC.
 It is used to access (control/monitor) the FPGA processing blocs from the local OS or from SOLEIL's control system (TANGO).
 
+It uses Yocto version 3.0.1 (zeus).
+
 image::synoptique_platform.png[Platform,500]
 
 
@@ -42,7 +44,7 @@ Every layers are git submodules.
 
 === System requirements
 
-_To be completed_
+See https://docs.yoctoproject.org/3.0.1/ref-manual/ref-manual.html#required-packages-for-the-build-host
 
 === Building the system