Set fixed version of postgres

Signed-off-by: Marco Marinello <me@marcomarinello.it>

docker-compose.yml

@@ -3,12 +3,13 @@ version: '3.5'
 services:
   postgres:
     container_name: pg
-    image: postgres
+    image: postgres:14
     restart: unless-stopped
     ports:
       - 5432:5432
     environment:
       POSTGRES_USER: ${POSTGRES_USER:-postgres}
+      POSTGRES_DB: nc
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-changeme}
       PGDATA: /data/postgres
     volumes: