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Dockerfile

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+# ── Stage 1: builder ─────────────────────────────────────────────────────────
+FROM python:3.11-slim AS builder
+
+WORKDIR /build
+
+# System deps for Pillow
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        gcc \
+        libjpeg-dev \
+        zlib1g-dev \
+        libfreetype6-dev \
+        liblcms2-dev \
+        libopenjp2-7-dev \
+        libtiff-dev \
+        libwebp-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir --prefix=/install -r requirements.txt
+
+
+# ── Stage 2: runtime ─────────────────────────────────────────────────────────
+FROM python:3.11-slim
+
+LABEL maintainer="WelcomeBot"
+LABEL description="Discord Welcome Bot — restricted to guild 1463693244897693779"
+
+# Runtime system deps
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        libjpeg62-turbo \
+        zlib1g \
+        libfreetype6 \
+        fonts-dejavu-core \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy installed packages from builder
+COPY --from=builder /install /usr/local
+
+# Non-root user for security
+RUN useradd -m -u 1000 botuser
+USER botuser
+
+WORKDIR /app
+
+# Copy source
+COPY --chown=botuser:botuser src/ ./
+
+# Persistent data directory
+RUN mkdir -p /app/data
+
+# Environment
+ENV PYTHONUNBUFFERED=1
+ENV PYTHONDONTWRITEBYTECODE=1
+
+# Health check — just verifies Python process alive
+HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
+    CMD python -c "import discord; print('ok')" || exit 1
+
+CMD ["python", "bot.py"]

requirements.txt

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+discord.py==2.3.2
+Pillow==10.3.0
+aiohttp==3.9.5
+numpy==1.26.4