feat: Docker and systemd deployment files

Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY pyproject.toml .
+RUN pip install --no-cache-dir -e .
+
+COPY fablednetmon/ fablednetmon/
+COPY alembic.ini .
+
+# Runtime directories
+RUN mkdir -p /data/playbook_cache /data/plugins
+
+ENV FABLEDNETMON_CONFIG=/config/config.yaml
+
+EXPOSE 5000
+
+CMD ["fablednetmon", "--host", "0.0.0.0", "--port", "5000"]

docker-compose.yml

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+services:
+  app:
+    build: .
+    ports:
+      - "5000:5000"
+    volumes:
+      - ./config.yaml:/config/config.yaml:ro
+      - playbook_cache:/data/playbook_cache
+      - plugins:/data/plugins
+    environment:
+      - FABLEDNETMON_DATABASE__URL=postgresql+asyncpg://fablednetmon:fablednetmon@db/fablednetmon
+    depends_on:
+      db:
+        condition: service_healthy
+    restart: unless-stopped
+
+  db:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_USER: fablednetmon
+      POSTGRES_PASSWORD: fablednetmon
+      POSTGRES_DB: fablednetmon
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U fablednetmon"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    restart: unless-stopped
+
+volumes:
+  pgdata:
+  playbook_cache:
+  plugins:

systemd/fablednetmon.service

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+[Unit]
+Description=FabledNetMon monitoring server
+After=network.target postgresql.service
+
+[Service]
+Type=simple
+User=fablednetmon
+WorkingDirectory=/opt/fablednetmon
+ExecStart=/opt/fablednetmon/.venv/bin/fablednetmon --config /etc/fablednetmon/config.yaml
+Restart=on-failure
+RestartSec=5s
+Environment=PYTHONUNBUFFERED=1
+
+[Install]
+WantedBy=multi-user.target