alpine-server-setup/services/basic/outgoing.policy.json

{
    "description": "Allow outgoing connections for http/https, dns, ssh, ntp, ssh and ping",
    "filter": [
        {
            "in": "_fw",
            "out": "WAN",
            "service": ["http", "https", "dns", "ssh", "ntp", "ping"],
            "action": "accept"
        }
    ]
}