feat: publish CodexPi contest snapshot

deploy/systemd/codexpi-host-agent.service

@@ -0,0 +1,19 @@
+[Unit]
+Description=CodexPi private host agent channel
+After=network-online.target
+
+[Service]
+Type=simple
+User=__CODEXPI_USER__
+Group=__CODEXPI_GROUP__
+WorkingDirectory=__CODEXPI_ROOT__
+ExecStart=/usr/bin/python3 __CODEXPI_ROOT__/scripts/codexpi_host_agent.py --socket __CODEXPI_ROOT__/data/host-agent/agent.sock --token-file __CODEXPI_ROOT__/data/host-agent/agent.token
+Restart=on-failure
+RestartSec=5
+NoNewPrivileges=false
+PrivateTmp=true
+ProtectHome=false
+ProtectSystem=false
+
+[Install]
+WantedBy=multi-user.target