mcphub/Dockerfile.slim

# ===================================
# MCP Hub — Dockerfile (Debian slim, restrictive-network variant)
# ===================================
# Plan B fallback when both registry-1.docker.io AND
# dl-cdn.alpinelinux.org are unreachable from the build host.
#
# Switches the base from python:3.12-alpine (musl + apk) to
# python:3.12-slim-bookworm (Debian + apt). Debian's package mirrors
# are CDN-fronted (Cloudflare/Fastly) and are usually reachable from
# networks that block Alpine's CDN. Image is pulled from mirror.gcr.io
# to also bypass Docker Hub TLS issues.
#
# Tradeoffs vs Dockerfile.mirror (Alpine):
#   - Image size: ~120 MB (slim) vs ~60 MB (alpine) — acceptable
#   - Compatibility: ALL Python wheels work (no musl rebuild needed)
#   - Security baseline: equivalent (slim is minimal Debian, no shell extras)
#
# Switch back to Dockerfile.mirror once dl-cdn.alpinelinux.org reachable
# OR back to Dockerfile once registry-1.docker.io is reachable.
# ===================================

# Stage 1: Build stage
FROM mirror.gcr.io/library/python:3.12-slim-bookworm AS builder

# Optional HTTP proxy for restricted networks. ARG values are NOT baked
# into the final image, so the runtime container never carries the proxy.
ARG BUILD_HTTP_PROXY=""
ARG BUILD_HTTPS_PROXY=""
ARG BUILD_NO_PROXY=""

# Install build dependencies via apt (proxy honoured if BUILD_HTTP_PROXY set)
RUN export HTTP_PROXY="${BUILD_HTTP_PROXY}" \
           HTTPS_PROXY="${BUILD_HTTPS_PROXY}" \
           NO_PROXY="${BUILD_NO_PROXY}" \
    && apt-get update && apt-get install -y --no-install-recommends \
        build-essential \
        libffi-dev \
        libssl-dev \
    && rm -rf /var/lib/apt/lists/*

# Create build directory
WORKDIR /build

# Copy requirements and install Python dependencies (proxy honoured)
COPY requirements.txt .
RUN export HTTP_PROXY="${BUILD_HTTP_PROXY}" \
           HTTPS_PROXY="${BUILD_HTTPS_PROXY}" \
           NO_PROXY="${BUILD_NO_PROXY}" \
    && pip install --no-cache-dir --user -r requirements.txt


# Stage 2: Production stage
FROM mirror.gcr.io/library/python:3.12-slim-bookworm AS production

# Re-declare proxy ARGs in this stage (ARGs don't cross stage boundaries).
ARG BUILD_HTTP_PROXY=""
ARG BUILD_HTTPS_PROXY=""
ARG BUILD_NO_PROXY=""

# CRITICAL: Install wget for health checks + docker-cli for WP-CLI tools
# libmagic1 is required by python-magic (F.5a media upload MIME sniffing)
RUN export HTTP_PROXY="${BUILD_HTTP_PROXY}" \
           HTTPS_PROXY="${BUILD_HTTPS_PROXY}" \
           NO_PROXY="${BUILD_NO_PROXY}" \
    && apt-get update && apt-get install -y --no-install-recommends \
        wget \
        curl \
        docker.io \
        libmagic1 \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user for security and grant Docker socket access
# Docker group (GID 999) allows access to /var/run/docker.sock
RUN groupadd -g 1001 appgroup && \
    useradd -u 1001 -g appgroup -s /bin/sh -m appuser && \
    (groupadd -g 999 docker 2>/dev/null || true) && \
    (usermod -aG docker appuser 2>/dev/null || true)

# Set working directory
WORKDIR /app

# Copy Python packages from builder
COPY --from=builder /root/.local /home/appuser/.local

# Copy application code
COPY --chown=appuser:appgroup . .

# Create data directories for API keys and logs with correct ownership
# This must be done before switching to non-root user
RUN mkdir -p /app/data /app/logs && \
    chown -R appuser:appgroup /app/data /app/logs && \
    chmod 755 /app/data /app/logs

# Make server.py executable
RUN chmod +x server.py

# Switch to non-root user
USER appuser

# Add local packages to PATH
ENV PATH=/home/appuser/.local/bin:$PATH
ENV PYTHONUNBUFFERED=1

# CRITICAL: EXPOSE port for Coolify
EXPOSE 8000

# CRITICAL: Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8000/health || exit 1

# CRITICAL: Listen on 0.0.0.0 (not localhost!)
# Run server with streamable-http transport on port 8000
CMD ["python", "server.py", "--transport", "streamable-http", "--port", "8000", "--host", "0.0.0.0"]