DOCS: update to deployment documentation and new production deployments doc

docs/source/production-deployments.rst

@@ -0,0 +1,48 @@
+=========================================
+Considerations for Production Deployments
+=========================================
+
+This document contains a number of suggestions for deploying
+MediaGoblin in actual production environments. Consider
+":doc:`deploying`" for a basic overview of how to deploy Media
+Goblin.
+
+Celery
+------
+
+While the ``./lazyserer.sh`` configuration provides an efficient way to
+start using a MediaGoblin instance, it is not suitable for production
+deployments for several reasons:
+
+1. In nearly every scenario, work on the Celery queue will need to
+   balance with the demands of other processes, and cannot proceed
+   synchronously. This is a particularly relevant problem if you use
+   MediaGoblin to host Video content.
+
+2. Processing with Celery ought to be operationally separate from the
+   MediaGoblin application itself, this simplifies management and
+   support better workload distribution.
+
+3. ... additional reason here. ....
+
+Build an :ref:`init script <init-script>` around the following
+command.
+
+      CELERY_CONFIG_MODULE=mediagoblin.init.celery.from_celery ./bin/celeryd
+
+Modify your existing MediaGoblin and application init scripts, if
+necessary, to prevent them from starting their own ``celeryd``
+processes.
+
+.. _init-script:
+
+Use an Init Script
+-------------------
+
+TODO insert init script here
+
+Other Concerns
+--------------
+
+TODO What are they?
+