Document PostgreSQL process manager (#1746)

* Document PostgreSQL process manager

* Update ogcapi-processes.rst

---------

Co-authored-by: Tom Kralidis <[email protected]>

docs/source/data-publishing/ogcapi-processes.rst

@@ -52,11 +52,11 @@ can be requested by including the ``Prefer: respond-async`` HTTP header in the r
            output_dir: /tmp/
 
 MongoDB
---------------------
-As an alternative to the default a manager employing `MongoDB`_ can be used. 
-The connection to an installed `MongoDB`_ instance must be provided in the configuration.
-`MongoDB`_ uses the localhost and port 27017 by default. Jobs are stored in a collection named
-job_manager_pygeoapi.
+-------
+As an alternative to the default, a manager employing `MongoDB`_ can be used. 
+The connection to a `MongoDB`_ instance must be provided in the configuration.
+`MongoDB`_ uses ``localhost`` and port ``27017`` by default. Jobs are stored in a collection named
+``job_manager_pygeoapi``.
 
 .. code-block:: yaml
 
@@ -67,10 +67,33 @@ job_manager_pygeoapi.
            output_dir: /tmp/
 
 
+PostgreSQL
+----------
+As another alternative to the default, a manager employing `PostgreSQL`_ can be used.
+The connection to a `PostgreSQL`_ database must be provided in the configuration.
+`PostgreSQL`_ uses ``localhost`` and port ``5432`` by default. Jobs are stored in a table named ``jobs``.
+
+.. code-block:: yaml
+
+   server:
+       manager:
+           name: PostgreSQL
+           connection:
+               host: localhost
+               port: 5432
+               database: test
+               user: postgres
+               password: ${POSTGRESQL_PASSWORD:-postgres}
+           # Alternative accepted connection definition:
+           # connection: postgresql://postgres:postgres@localhost:5432/test
+           # connection: postgresql://postgres:${POSTGRESQL_PASSWORD:-postgres}@localhost:5432/test
+           output_dir: /tmp
+
+
 Putting it all together
 -----------------------
 
-To summarize how pygeoapi processes and managers work together::
+To summarize how pygeoapi processes and managers work together:
 
 * process plugins implement the core processing / workflow functionality
 * manager plugins control and manage how processes are executed