feat(dev): add Dockerfile for container deployment

Dockerfile

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+# Slurm-web Container Image
+# 
+# Multi-stage build for Slurm-web gateway and agent components.
+# Includes frontend assets built from source.
+#
+# Usage:
+#   docker build -t slurm-web:latest .
+#   docker run -e SLURM_WEB_MODE=gateway -p 5011:5011 slurm-web:latest
+#   docker run -e SLURM_WEB_MODE=agent -p 5012:5012 slurm-web:latest
+#
+# Environment Variables:
+#   SLURM_WEB_MODE: Set to "gateway" or "agent" to select component
+#
+# Configuration:
+#   Mount config files to /etc/slurm-web/gateway.ini or /etc/slurm-web/agent.ini
+#   Mount JWT key to /var/lib/slurm-web/jwt.key
+
+# Stage 1: Build frontend assets
+FROM node:20-slim AS frontend-builder
+
+WORKDIR /app
+
+# Copy frontend source and assets (needed for symlinks)
+COPY frontend/ frontend/
+COPY assets/ assets/
+
+WORKDIR /app/frontend
+RUN npm ci && npm run build-only
+
+# Stage 2: Build Python wheel
+FROM python:3.11-slim AS python-builder
+
+WORKDIR /app
+COPY pyproject.toml README.md LICENSE ./
+COPY slurmweb/ slurmweb/
+COPY conf/ conf/
+
+RUN pip install --no-cache-dir build && \
+    python -m build --wheel
+
+# Stage 3: Final runtime image
+FROM python:3.11-slim
+
+LABEL org.opencontainers.image.title="Slurm-web"
+LABEL org.opencontainers.image.description="Web dashboard for Slurm HPC clusters"
+LABEL org.opencontainers.image.url="https://github.com/rackslab/Slurm-web"
+LABEL org.opencontainers.image.source="https://github.com/rackslab/Slurm-web"
+LABEL org.opencontainers.image.licenses="MIT"
+
+# Install runtime dependencies
+# - GTK/Pango libraries for RacksDB infrastructure visualization
+# - LDAP libraries for authentication support
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    pkg-config \
+    libcairo2-dev \
+    libgirepository-2.0-dev \
+    gir1.2-glib-2.0 \
+    gir1.2-pango-1.0 \
+    gir1.2-pangocairo-1.0 \
+    python3-gi \
+    python3-gi-cairo \
+    libldap2-dev \
+    libsasl2-dev \
+    && rm -rf /var/lib/apt/lists/* \
+    && apt-get clean
+
+WORKDIR /app
+
+# Copy built artifacts from previous stages
+COPY --from=python-builder /app/dist/*.whl /app/
+COPY --from=frontend-builder /app/frontend/dist /usr/share/slurm-web/frontend
+COPY --from=python-builder /app/conf/vendor /usr/share/slurm-web/conf
+
+# Install Slurm-web with all optional dependencies
+RUN WHEEL=$(ls /app/*.whl) && \
+    pip install --no-cache-dir "${WHEEL}[gateway,agent]" && \
+    rm -f /app/*.whl
+
+# Create required directories
+RUN mkdir -p /etc/slurm-web /var/lib/slurm-web
+
+# Copy entrypoint script
+COPY <<'EOF' /entrypoint.sh
+#!/bin/bash
+set -e
+
+case "${SLURM_WEB_MODE}" in
+    gateway)
+        exec slurm-web gateway --conf "${SLURM_WEB_CONF:-/etc/slurm-web/gateway.ini}"
+        ;;
+    agent)
+        exec slurm-web agent --conf "${SLURM_WEB_CONF:-/etc/slurm-web/agent.ini}"
+        ;;
+    *)
+        echo "Error: Set SLURM_WEB_MODE to 'gateway' or 'agent'"
+        echo "Usage: docker run -e SLURM_WEB_MODE=gateway slurm-web"
+        exit 1
+        ;;
+esac
+EOF
+
+RUN chmod +x /entrypoint.sh
+
+# Gateway listens on 5011, Agent on 5012
+EXPOSE 5011 5012
+
+ENTRYPOINT ["/entrypoint.sh"]

docker-compose.yml

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+# Slurm-web Docker Compose
+#
+# This compose file runs both gateway and agent components for local development.
+# Note: This requires a running slurmrestd service accessible from the containers.
+#
+# Usage:
+#   docker compose up --build
+#
+# Access:
+#   Gateway UI: http://localhost:5011
+#   Agent API:  http://localhost:5012
+
+services:
+  gateway:
+    build: .
+    environment:
+      SLURM_WEB_MODE: gateway
+    ports:
+      - "5011:5011"
+    volumes:
+      - ./dev/gateway.ini:/etc/slurm-web/gateway.ini:ro
+      - jwt-key:/var/lib/slurm-web:ro
+    depends_on:
+      - agent
+    healthcheck:
+      test: ["CMD", "python3", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:5011/')"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  agent:
+    build: .
+    environment:
+      SLURM_WEB_MODE: agent
+    ports:
+      - "5012:5012"
+    volumes:
+      - ./dev/agent.ini:/etc/slurm-web/agent.ini:ro
+      - jwt-key:/var/lib/slurm-web:ro
+    healthcheck:
+      test: ["CMD", "python3", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:5012/version')"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+volumes:
+  jwt-key:
+    # Mount your JWT key file here for slurmrestd authentication
+