Upgrade Postgres from 17.9 to 18.3 (#848)

Author: northeastprince

docker-compose.yml

@@ -2,16 +2,16 @@
 # If you bump the database version here, be sure to update the database accordingly on Coolify as well.
 
 services:
-  postgres:
-    image: postgres:17.9
+  postgres-18:
+    image: postgres:18.3
     ports:
       - ${POSTGRES_PORT-:5432}:5432
     environment:
       POSTGRES_USER: hackathons
       POSTGRES_DB: hackathons_test
       POSTGRES_HOST_AUTH_METHOD: trust
     volumes:
-      - postgres-data:/var/lib/postgresql/data
+      - postgres-18:/var/lib/postgresql
 
 volumes:
-  postgres-data: {}
+  postgres-18: {}