chore(docker): create /data dirs and chown for model/cache; set OMP_NUM_THREADS=1

Dockerfile

@@ -12,7 +12,8 @@ ENV HF_HUB_ENABLE_HF_TRANSFER=1 \
     HUGGINGFACE_HUB_CACHE=/data/.cache/huggingface \
     HF_HOME=/data/.cache/huggingface \
     DOTS_OCR_LOCAL_DIR=/data/models/dots-ocr \
-    PYTORCH_CUDA_ALLOC_CONF=max_split_size_mb=512
+    PYTORCH_CUDA_ALLOC_CONF=max_split_size_mb=512 \
+    OMP_NUM_THREADS=1
 
 # Install system dependencies as root
 RUN apt-get update && apt-get install -y \
@@ -39,6 +40,10 @@ RUN apt-get update && apt-get install -y \
 # Set up a new user named "user" with user ID 1000
 RUN useradd -m -u 1000 user
 
+# Create persistent data directories and grant write access to the user
+RUN mkdir -p /data/.cache/huggingface /data/models/dots-ocr && \
+    chown -R 1000:1000 /data
+
 # Switch to the "user" user
 USER user