Create Dockerfile

Dockerfile

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+FROM python:3.9-slim-bookworm
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false
+
+WORKDIR /app
+
+# system deps (keep minimal; drop build-essential if not building wheels)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl git ca-certificates \
+ && rm -rf /var/lib/apt/lists/*
+
+# python deps (better cache behavior)
+COPY requirements.txt .
+RUN python -m pip install --upgrade pip \
+ && pip install --no-cache-dir --prefer-binary -r requirements.txt
+
+# your code
+COPY . .
+
+ENV PORT=7860
+EXPOSE 7860
+
+# healthcheck helps detect boot issues
+HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
+  CMD curl --fail http://127.0.0.1:${PORT}/_stcore/health || exit 1
+
+CMD ["sh", "-c", "streamlit run app.py --server.address=0.0.0.0 --server.port=${PORT}"]