fix: Downgrade PostgreSQL 18 → 17 (#10)

PostgreSQL 18 Docker images changed data directory structure,
requiring pg_upgrade for existing databases. Downgrade to 17
to restore functionality without migration.

See: docker-library/postgres#1259

Co-authored-by: Stefan <githubspiev@gmail.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: 3 people

paperless/docker-compose.yml

@@ -35,7 +35,7 @@ services:
     volumes:
       - ./redisdata:/data
   db:
-    image: docker.io/library/postgres:18
+    image: docker.io/library/postgres:17
     restart: unless-stopped
     volumes:
       - ./postgres:/var/lib/postgresql/data

teslamate/docker-compose.yml

@@ -25,7 +25,7 @@ services:
       - teslamate-db
 
   teslamate-db:
-    image: postgres:18-alpine
+    image: postgres:17-alpine
     container_name: teslamate-db
     restart: unless-stopped
     environment: