Docker optimisation (#74)

* optimised docker image.

* bump version

Co-authored-by: Peter Dwyer <peter.dwyer@clanwilliamhealth.com>

docker-compose.yml

@@ -35,7 +35,7 @@ services:
 #    command: /bin/bash entrypoint-cron.sh
 
   database:
-    image: postgres:11.4-alpine
+    image: postgres:14-alpine
     expose:
       - 5432
     volumes: