feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

checks/cdns/config.go

@@ -0,0 +1,39 @@
+package cdns
+
+import (
+	"time"
+
+	"github.com/miekg/dns"
+)
+
+// DNS check configuration constants.
+const (
+	// Timeout is the DNS query timeout in seconds.
+	Timeout        float64 = float64(1.5)
+	MaxTrials      uint    = 3
+	MaxNameservers uint    = 20
+	MaxAddresses   uint    = 10
+	EdnsbufferSize uint16  = 4096
+)
+
+var (
+	conf           *dns.ClientConfig
+	debug          = false
+	maxTrials      = 3
+	v4only         = true
+	v6only         = false
+	bufsize        = EdnsbufferSize
+	timeout        = time.Duration(float64(Timeout) * float64(time.Second))
+	noedns         = false
+	recursion      = false
+	tcp            = false
+	noauthrequired = false
+	nodnssec       = false
+)
+
+func init() {
+	conf = &dns.ClientConfig{
+		Servers: []string{"8.8.8.8", "1.1.1.1", "77.88.8.8"},
+		Port:    "53",
+	}
+}