Minor docs improvements

docs/configuring-playbook-postgres-backup.md

@@ -4,14 +4,24 @@ The playbook can install and configure [docker-postgres-backup-local](https://gi
 
 ## Adjusting the playbook configuration
 
+Minimal working configuration (`inventory/host_vars/matrix.DOMAIN/vars.yml`) to enable Postgres backup:
+
+```yaml
+matrix_postgres_backup_enabled: true
+```
+
+Refer to the table below for additional configuration variables and their default values.
+
+
 | Name                              | Default value                | Description                                                      |
 | :-------------------------------- | :--------------------------- | :--------------------------------------------------------------- |
-|matrix_postgres_backup_enabled|false|Set to true to use [docker-postgres-backup-local](https://github.com/prodrigestivill/docker-postgres-backup-local) to create automatic database backups|
-|matrix_postgres_backup_schedule| '@daily' |Cron-schedule specifying the interval between postgres backups.|
-|matrix_postgres_backup_keep_days|"7"|Number of daily backups to keep|
-|matrix_postgres_backup_keep_weeks|"4"|Number of weekly backups to keep|
-|matrix_postgres_backup_keep_months|"12"|Number of monthly backups to keep|
-|matrix_postgres_backup_path | "{{ matrix_base_data_path }}/postgres-backup" | Storagepath for the database backups|
+|`matrix_postgres_backup_enabled`|`false`|Set to true to use [docker-postgres-backup-local](https://github.com/prodrigestivill/docker-postgres-backup-local) to create automatic database backups|
+|`matrix_postgres_backup_schedule`| `'@daily'` |Cron-schedule specifying the interval between postgres backups.|
+|`matrix_postgres_backup_keep_days`|`"7"`|Number of daily backups to keep|
+|`matrix_postgres_backup_keep_weeks`|`"4"`|Number of weekly backups to keep|
+|`matrix_postgres_backup_keep_months`|`"12"`|Number of monthly backups to keep|
+|`matrix_postgres_backup_path` | `"{{ matrix_base_data_path }}/postgres-backup"` | Storagepath for the database backups|
+
 
 ## Installing
 
@@ -19,4 +29,4 @@ After configuring the playbook, run the [installation](installing.md) command ag
 
 ```
 ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
-```
+```

docs/maintenance-postgres.md

@@ -49,7 +49,9 @@ ansible-playbook -i inventory/hosts setup.yml --tags=run-postgres-vacuum,start
 
 ## Backing up PostgreSQL
 
-To make a back up of the current PostgreSQL database, make sure it's running and then execute a command like this on the server:
+To automatically make Postgres database backups on a fixed schedule, see [Setting up postgres backup](configuring-playbook-postgres-backup.md).
+
+To make a one off back up of the current PostgreSQL database, make sure it's running and then execute a command like this on the server:
 
 ```bash
 /usr/bin/docker exec \