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Dockerfile

@@ -1,20 +1,57 @@
-FROM python:3.13.5-slim
+# syntax=docker/dockerfile:1.7
+
+ARG PYTHON_VERSION=3.11-slim
+
+# ---------- Base (deps only, cached) ----------
+FROM python:${PYTHON_VERSION} AS base
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false
 
 WORKDIR /app
 
-RUN apt-get update && apt-get install -y \
-    build-essential \
-    curl \
-    git \
-    && rm -rf /var/lib/apt/lists/*
+# Create non-root user early (stable UID helps on some hosts)
+RUN useradd -m -u 10001 appuser
 
+# Install deps (cache-friendly)
 COPY requirements.txt ./
-COPY src/ ./src/
+RUN --mount=type=cache,target=/root/.cache/pip,sharing=locked \
+    python -m pip install -U pip && \
+    python -m pip install -r requirements.txt
+
+
+# ---------- Test stage ----------
+FROM base AS test
+
+COPY requirements-dev.txt ./
+RUN --mount=type=cache,target=/root/.cache/pip,sharing=locked \
+    python -m pip install -r requirements-dev.txt
+
+COPY . .
+RUN python -m ruff check . && \
+    python -m ruff format --check . && \
+    python -m pytest -q
+
+
+# ---------- Runtime stage ----------
+FROM base AS runtime
+
+# Copy app as non-root owner (avoid chown -R)
+COPY --chown=appuser:appuser . /app
+
+USER appuser
 
-RUN pip3 install -r requirements.txt
+# Defaults (overrideable)
+ENV HOST=0.0.0.0 \
+    PORT=8501 \
+    APP_FILE=app.py
 
 EXPOSE 8501
 
-HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health
+# Optional healthcheck (keeps it generic enough)
+# HEALTHCHECK --interval=30s --timeout=3s --start-period=20s \
+#   CMD python -c "import socket; s=socket.socket(); s.settimeout(2); s.connect(('127.0.0.1', int('${PORT}'))); s.close()"
 
-ENTRYPOINT ["streamlit", "run", "src/app.py", "--server.port=8501", "--server.address=0.0.0.0"]
+CMD ["sh", "-lc", "python -m streamlit run ${APP_FILE} --server.address=${HOST} --server.port=${PORT} --server.headless=true"]

LICENSE

@@ -0,0 +1,201 @@
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