Add doc about xsocs pypi repo

doc/source/install.rst

@@ -4,14 +4,22 @@ Installation
 
 *X-SOCS* supports `Python <https://www.python.org/>`_ versions >= 3.4 (recommended) and 2.7.
 
-Binary wheels of the latest development version of X-SOCS are available for Linux and Windows (for python >= 3.6) in the *X-SOCS* `wheelhouse <https://kmap.gitlab-pages.esrf.fr/xsocs/wheels/>`_.
+Binary wheels of X-SOCS are available for Linux and Windows (for Python >= 3.6):
+
+- Latest release in *X-SOCS* `package repository <https://gitlab.esrf.fr/kmap/xsocs/-/packages>`_.
+- Development version in *X-SOCS* `wheelhouse <https://kmap.gitlab-pages.esrf.fr/xsocs/wheels/>`_.
+
 
 To install *X-SOCS* with minimal dependency (to use from scripts)::
 
-    pip install --pre --find-links https://kmap.gitlab-pages.esrf.fr/xsocs/wheels/ xsocs [--user]
+    pip install --extra-index-url https://gitlab.esrf.fr/api/v4/projects/408/packages/pypi/simple xsocs [--user]
 
 or with graphical user interface dependencies::
 
+    pip install --extra-index-url https://gitlab.esrf.fr/api/v4/projects/408/packages/pypi/simple xsocs[gui] [--user]
+
+To install the current development version::
+
     pip install --pre --find-links https://kmap.gitlab-pages.esrf.fr/xsocs/wheels/ xsocs[gui] [--user]
 
 .. note::