docs: Mention Postgres for Docker development install

Might as well since it's there, and it gives some clue to anyone trying
to use Docker on non-x86.  I figured it was best to leave this out of
the README since it's incredibly niche.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>

diff --git a/docs/development/installation.rst b/docs/development/installation.rst
index 52dc2c33a2d831fa1da091e26a0ceb420647cdd0..0ab755f4b57020ab54c3372abe494ed6e6cec16a 100644 (file)
--- a/docs/development/installation.rst
+++ b/docs/development/installation.rst
@@ -37,6 +37,10 @@ configure Patchwork using Docker:
 
       $ docker-compose build
 
+   To use Postgres instead of MySQL, give the ``-f docker-compose-pg.yml``
+   argument to ``docker-compose``.  This is required on non-x86 architectures
+   as the MySQL Docker images do not have multiarch support.
+
 #. Run ``docker-compose up``:
 
    .. code-block:: shell