Add German OCR support to Paperless-ngx

- Created custom Dockerfile extending official paperless-ngx image
- Added tesseract-ocr-deu package for German language OCR
- Set PAPERLESS_OCR_LANGUAGE=deu+eng environment variable
- Updated CI/CD pipeline to build and push custom paperless image
- Modified deployment script to pull paperless image from GHCR
- Tested locally: German (deu) language pack now available alongside English

compose.dev.yml

@@ -54,7 +54,9 @@ services:
     command: ["python", "manage.py", "runserver", "0.0.0.0:8000"]
 
   paperless:
-    image: ghcr.io/paperless-ngx/paperless-ngx:latest
+    build:
+      context: ./paperless
+      dockerfile: Dockerfile
     ports:
       - "8082:8000"
     environment: