installer: split up new env creation into chain of tasks
diff --git a/core/installer/tasks/dns_test.go b/core/installer/tasks/dns_test.go
new file mode 100644
index 0000000..270a495
--- /dev/null
+++ b/core/installer/tasks/dns_test.go
@@ -0,0 +1,33 @@
+package tasks
+
+import (
+	"context"
+	"net"
+	"testing"
+	"time"
+)
+
+func TestGoogle(t *testing.T) {
+	ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
+	d := NewDNSResolverTask(
+		"welcome.t5.lekva.me",
+		[]net.IP{
+			net.ParseIP("135.181.48.180"),
+			net.ParseIP("65.108.39.172"),
+		},
+		ctx,
+		t.Logf,
+	)
+	d.FinalizeSubtasks()
+	ch := make(chan struct{})
+	d.OnDone(func(err error) {
+		if err != nil {
+			t.Logf("%s\n", err.Error())
+		} else {
+			t.Logf("Dooone")
+		}
+		ch <- struct{}{}
+	})
+	d.Start()
+	<-ch
+}