sing-box client json config ./sing-box -c config2.json run

config.json

{
  "log": {"level": "info"},
  "dns": {},
  "ntp": {},
  "inbounds": [ {
      "domain_strategy": "",
      "listen": "0.0.0.0",
        "type": "mixed",
      "listen_port": 2081
    }],
  "outbounds": [{
      "alter_id": 64,
      "domain_strategy": "",
      "security": "auto",
      "server": "51.195.35.146",
      "server_port": 49982,
      "tag": "proxy",
      "type": "vmess",
      "uuid": "418048af-a293-4b99-9b0c-98ca3580dd24"}
    ],
  "route": {},
  "experimental": {}
}