Dockerfile fix

Dockerfile

@@ -1,11 +1,26 @@
-FROM python:3.10-slim
+FROM python:3.12.8-slim
 
 WORKDIR /app
 
-# System dependencies required for runtime and healthcheck
+# System dependencies required for runtime
+# - curl for debugging
+# - git if needed by pip
+# - libfreetype6 and libpng16-16 required by matplotlib (Agg backend)
+# - fonts-dejavu-core for font rendering
+# - libglib2.0-0, libsm6, libxext6, libxrender1 are safe image libs some backends use
+# - ca-certificates to avoid TLS issues during pip installs and at runtime
 RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
     curl \
     git \
+    ca-certificates \
+    libfreetype6 \
+    libpng16-16 \
+    fonts-dejavu-core \
+    libglib2.0-0 \
+    libsm6 \
+    libxext6 \
+    libxrender1 \
     && rm -rf /var/lib/apt/lists/*
 
 # Environment optimizations and Streamlit defaults
@@ -14,21 +29,27 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
     PIP_NO_CACHE_DIR=1 \
     STREAMLIT_SERVER_HEADLESS=true \
     STREAMLIT_BROWSER_GATHER_USAGE_STATS=false \
-    MPLBACKEND=Agg
+    MPLBACKEND=Agg \
+    MPLCONFIGDIR=/tmp/matplotlib
+
+# Upgrade pip tooling to avoid build failures
+RUN python -m pip install --upgrade pip setuptools wheel
 
 # Install Python dependencies first (layer caching)
 COPY requirements.txt ./
-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
 
-# Hugging Face Spaces sets $PORT (default 7860). Expose it for clarity.
-EXPOSE 7860
+# Hugging Face Spaces sets $PORT (default 7860). Expose it for clarity. using 8501 for local consistency with Streamlit defaults
+
+EXPOSE 8501
+
+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
+# Rely on Spaces health checking; do not add Docker HEALTHCHECK to avoid premature failures
 
 # 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"]
+ENTRYPOINT ["sh", "-c", "streamlit run app.py --server.port=${PORT:-8501} --server.address=0.0.0.0"]

README.md

@@ -5,7 +5,8 @@ colorFrom: blue
 colorTo: indigo
 sdk: streamlit
 sdk_version: 1.25.0
-python_version: 3.10
+python_version: 3.12.8
+app_port: 8501
 app_file: app.py
 tags:
   - game