README: Add diagrams

README.md

@@ -34,6 +34,10 @@ micro-services :
 - `repochecker` is a side project to check offline for synchronization
   issues.
 
+Here is how thoses services speak to each others:
+
+![Overview of the micro-services](doc/micro-services.png)
+
 In the production setup, each micro-service runs in a dedicated
 container, isolated from each other. Moreover, two physical machines
 should be used:
@@ -47,6 +51,10 @@ should be used:
   requests from `phobos` filesystem and pushing to it newly generated
   static files.
 
+Concretely, the L2 looks like this:
+
+![Layer 2 connections](doc/l2.png)
+
 So, the general filesystem is organized this way:
 
 - `DASHBOARD` contains files structuring the content of the dashboard
@@ -80,6 +88,10 @@ So, the general filesystem is organized this way:
   resolve the association regarding `TEAMS` directory. There is also a
   special directory to handle team registration.
 
+Here is a diagram showing how each micro-service uses directories it has access to (blue for read access, red for write access):
+
+![Usage of directories by each micro-service](doc/directories.png)
+
 Local developer setup
 ---------------------
 
@@ -120,7 +132,7 @@ If your are trying to use the folder available with the Owncloud service, make t
 
 Running this project requires a web server (configuration is given for nginx),
 a database (currently supporting only MySQL/MariaDB), a Go compiler for the
-revision 1.16 at least and a `inotify`-aware system. You'll also need NodeJS to
+revision 1.18 at least and a `inotify`-aware system. You'll also need NodeJS to
 compile some user interfaces.
 
 1. Above all, you need to build Node projects: