Merge pull request #419 from cymed/add-postgis-caveat-to-docs

Add caveat in docs concerning #20

docs/en/installation-guide/requirements.rst

@@ -9,3 +9,13 @@ The following Python packages (installed using `pip <https://pypi.org/project/pi
 * `Pirogue <https://github.com/opengisch/pirogue>`_ for model generation and upgrades
 * `sqlalchemy <https://github.com/sqlalchemy/sqlalchemy>`_ for INTERLIS imports and exports
 * `geoalchemy2 <https://github.com/geoalchemy/geoalchemy2>`_ for INTERLIS imports and exports
+
+TEKSI Wastewater requires PostGIS functions that did not function properly in a set of releases:
+
+* Versions before PostGIS 3.2 are not affected
+* When using PostGIS 3.2, the bug is fixed in Version 3.2.7
+* When using PostGIS 3.3, the bug is fixed in Version 3.3.6
+* When using PostGIS 3.4, the bug is fixed in Version 3.4.2
+* Versions of PostGIS 3.5 or later are not affected
+
+If you need support installing TEKSI Wastewater, contact one of our `certified service providers <https://www.teksi.ch/modules/#prestataires>`_