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+# syntax=docker/dockerfile:1
+
+# =============================================================================
+# CRM System v1.0 - Production Dockerfile
+# Multi-stage build: builder (with build tools) + runtime (slim, non-root)
+# Base: python:3.12-slim
+# =============================================================================
+
+# === Stage 1: Builder ===
+# Installs build dependencies (needed for compiling asyncpg, cryptography, etc.)
+FROM python:3.12-slim AS builder
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1
+
+# Build tools (gcc, libpq-dev) — needed for asyncpg + python-jose[cryptography]
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+        build-essential \
+        libpq-dev \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy ONLY requirements first for optimal layer caching
+COPY requirements.txt .
+
+# Install all production dependencies into a user-local prefix
+RUN pip install --user --no-cache-dir -r requirements.txt
+
+# === Stage 2: Runtime ===
+# Slim image, non-root user, no build tools
+FROM python:3.12-slim AS runtime
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PATH=/home/appuser/.local/bin:$PATH
+
+# Runtime dependencies: libpq5 (for asyncpg), curl (for healthcheck)
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+        libpq5 \
+        curl \
+ && rm -rf /var/lib/apt/lists/* \
+ && groupadd -g 1000 appuser \
+ && useradd -m -u 1000 -g appuser appuser
+
+WORKDIR /app
+
+# Copy installed Python packages from builder
+COPY --from=builder /root/.local /home/appuser/.local
+
+# Copy application source (static files included via app/webui/)
+COPY --chown=appuser:appuser . .
+
+# Make prestart.sh executable
+RUN chmod +x /app/prestart.sh
+
+USER appuser
+
+# Internal port (Coolify/Traefik terminate SSL on 443 externally)
+EXPOSE 8000
+
+# Healthcheck: hits the root-level /health endpoint defined in app/main.py
+# Interval 30s, timeout 10s, 3 retries, 15s start-period (migrations need time)
+HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
+    CMD curl -fsS http://localhost:8000/health || exit 1
+
+# Entrypoint runs DB migrations first, then starts uvicorn as PID 1
+ENTRYPOINT ["/app/prestart.sh"]