update, adding docker backup script outline

docs/system/updating.md

@@ -11,6 +11,33 @@ For all setups using Docker the updating process look something like this
 2. Pull the latest image using `docker-compose pull`
 3. Start the container again using `docker-compose up -d`
 
+## Docker Script
+```
+#get vars
+input name of docker_db_container
+input working directory
+
+#backup docker
+sudo docker exec -t docker_db_recipes_1 pg_dumpall -U djangouser > pgdump.sql
+
+docker-compose down
+mv postgresql date_postgresqlbackup
+check that docker-compose.yml files are up to date with latest recommended from install instructions
+check that .env is up to date with latest recommended from install instructions
+
+#start update
+docker-compose pull
+docker-compose up -d
+wait 5 minutes
+docker-compose down
+docker-compose up -d
+wait 5 minutes
+
+#import database to new setup
+cat pgdump.sql | sudo docker exec -i docker_db_recipes_1 psql postgres -U djangouser
+docker-compose down
+docker-compose up -d
+```
 
 ## Manual
 
@@ -20,4 +47,4 @@ After that make sure to run:
 1. `manage.py collectstatic`
 2. `manage.py migrate`
 
-To apply all new migrations and collect new static files.
+To apply all new migrations and collect new static files.