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

paperless/Dockerfile

@@ -0,0 +1,22 @@
+# Custom Paperless-ngx with German OCR support
+FROM ghcr.io/paperless-ngx/paperless-ngx:latest
+
+# Switch to root to install packages
+USER root
+
+# Update package list and install German OCR language data
+# The correct package name is tesseract-ocr-deu (not tesseract-data-deu)
+RUN apt-get update && \
+    apt-get install -y \
+    tesseract-ocr-deu \
+    && apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Verify German language pack is installed
+RUN tesseract --list-langs | grep deu || echo "German language pack not found"
+
+# Switch back to paperless user
+USER paperless
+
+# Set the OCR language to include German and English
+ENV PAPERLESS_OCR_LANGUAGE=deu+eng