Add dockerfile v1

Dockerfile

@@ -1,20 +1,34 @@
-FROM python:3.13.5-slim
+FROM python:3.10-slim
 
 WORKDIR /app
 
-RUN apt-get update && apt-get install -y \
-    build-essential \
+# System dependencies required for runtime and healthcheck
+RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     git \
     && rm -rf /var/lib/apt/lists/*
 
+# Environment optimizations and Streamlit defaults
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    STREAMLIT_SERVER_HEADLESS=true \
+    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false \
+    MPLBACKEND=Agg
+
+# Install Python dependencies first (layer caching)
 COPY requirements.txt ./
-COPY src/ ./src/
+RUN pip install --no-cache-dir -r requirements.txt
 
-RUN pip3 install -r requirements.txt
+# Copy application source
+COPY app.py ./app.py
+COPY battlewords ./battlewords
 
-EXPOSE 8501
+# Hugging Face Spaces sets $PORT (default 7860). Expose it for clarity.
+EXPOSE 7860
 
-HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health
+# Healthcheck against the dynamic port
+HEALTHCHECK CMD curl --fail http://localhost:${PORT:-7860}/_stcore/health || exit 1
 
-ENTRYPOINT ["streamlit", "run", "src/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0"]
+# Use shell form so $PORT expands at runtime
+ENTRYPOINT ["sh", "-c", "streamlit run app.py --server.port=${PORT:-7860} --server.address=0.0.0.0"]