Update Dockerfile

Dockerfile

@@ -1,7 +1,6 @@
-# Dockerfile
 FROM python:3.9-slim
 
-# System dependencies
+# System dependencies with improved virtual display and fonts support
 RUN apt-get update && \
     apt-get install -y \
     gcc \
@@ -10,6 +9,9 @@ RUN apt-get update && \
     xvfb \
     fonts-liberation \
     fonts-dejavu \
+    fonts-noto \
+    fonts-noto-cjk \
+    fonts-freefont-ttf \
     && rm -rf /var/lib/apt/lists/*
 
 # Create non-root user and cache directory
@@ -34,8 +36,9 @@ RUN python -c "from accelerate.utils import write_basic_config; write_basic_conf
     chown -R appuser:appuser /app/.cache
 
 # Pre-download model (GPT-2 Medium)
-RUN python -c "from transformers import GPT2LMHeadModel; \
-GPT2LMHeadModel.from_pretrained('gpt2-medium', use_safetensors=True)" && \
+RUN python -c "from transformers import AutoModelForCausalLM, AutoTokenizer; \
+    model = AutoModelForCausalLM.from_pretrained('gpt2-medium', use_safetensors=True); \
+    tokenizer = AutoTokenizer.from_pretrained('gpt2-medium')" && \
     chown -R appuser:appuser /app/.cache
 
 # Copy application code
@@ -44,5 +47,5 @@ COPY --chown=appuser:appuser . .
 # Switch to non-root user
 USER appuser
 
-# Runtime configuration
-CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--timeout", "600", "--preload", "app:app"]
+# Runtime configuration with improved timeout for model loading and PDF generation
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--timeout", "900", "--workers", "1", "--preload", "app:app"]