feat(hf-space): add fully compatible Dockerfile for HuggingFace runtime

Dockerfile

@@ -1,20 +1,23 @@
 FROM python:3.12-slim
 
-ENV PYTHONDONTWRITEBYTECODE=1 \
+ENV PIP_NO_CACHE_DIR=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
-    PIP_NO_CACHE_DIR=1 \
     PORT=7860 \
     GRADIO_SERVER_NAME=0.0.0.0
 
+# HuggingFace mounts your repository at /home/user/app in RUN time
 WORKDIR /home/user/app
 
-
-RUN pip install --no-cache-dir -U pip && \
-    pip install --no-cache-dir -r requirements.txt
-
+# Install Python dependencies — requirements.txt is mounted at run time → accessible here
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc build-essential && \
+    pip install --no-cache-dir -U pip && \
+    pip install --no-cache-dir -r requirements.txt && \
+    apt-get purge -y gcc build-essential && \
+    apt-get autoremove -y && apt-get clean -y
 
 EXPOSE 7860
 
-# Ensure base image ENTRYPOINT (if any) doesn't override ours
 ENTRYPOINT []
 CMD ["python", "-u", "start.py"]