v2ray-core/release/config/systemd/system/v2ray@.service

[Unit]
Description=V2Ray Service
Documentation=https://www.v2fly.org/
After=network.target nss-lookup.target

[Service]
User=nobody
CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
AmbientCapabilities=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
NoNewPrivileges=true
ExecStart=/usr/local/bin/v2ray -config /usr/local/etc/v2ray/%i.json
Restart=on-failure
RestartPreventExitStatus=23

[Install]
WantedBy=multi-user.target