Fix: Explicitly set TESSDATA_PREFIX to resolve Tesseract language loading issue

Dockerfile

@@ -15,7 +15,10 @@ RUN apt-get update && apt-get install -y \
     libxrender-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Set up Python Virtual Environment (to avoid PEP 668 errors)
+# Set Tesseract Data Prefix to fix "Error opening data file"
+ENV TESSDATA_PREFIX=/usr/share/tesseract-ocr/5/tessdata/
+
+# Set up Python Virtual Environment
 ENV VIRTUAL_ENV=/opt/venv
 RUN python3 -m venv $VIRTUAL_ENV
 ENV PATH="$VIRTUAL_ENV/bin:$PATH"
@@ -26,7 +29,7 @@ RUN pip install --no-cache-dir paddlepaddle paddleocr pillow pillow-heif
 # Set working directory
 WORKDIR /app
 
-# Copy all your files
+# Copy all files
 COPY . .
 
 # Install Backend dependencies
@@ -39,4 +42,4 @@ RUN cd frontend && npm install && npm run build
 EXPOSE 7860
 
 # Start the application
-CMD ["node", "backend/server.js"]
+CMD ["node", "backend/server.js"]