Fixes #72

- Using custom DNS internally (without TLS) to download Unbound files
- Using then Unbound with DNS over TLS internally and system wide
- Works even if you host system DNS is broken
- Waits a few milliseconds for Unbound to start up

internal/dns/os.go

@@ -1,13 +1,14 @@
 package dns
 
 import (
+	"net"
 	"strings"
 
 	"github.com/qdm12/private-internet-access-docker/internal/constants"
 )
 
-func (c *configurator) SetLocalNameserver() error {
-	c.logger.Info("%s: setting local nameserver to 127.0.0.1", logPrefix)
+func (c *configurator) SetNameserver(IP net.IP) error {
+	c.logger.Info("%s: setting local nameserver to %s", logPrefix, IP.String())
 	data, err := c.fileManager.ReadFile(string(constants.ResolvConf))
 	if err != nil {
 		return err
@@ -20,12 +21,12 @@ func (c *configurator) SetLocalNameserver() error {
 	found := false
 	for i := range lines {
 		if strings.HasPrefix(lines[i], "nameserver ") {
-			lines[i] = "nameserver 127.0.0.1"
+			lines[i] = "nameserver " + IP.String()
 			found = true
 		}
 	}
 	if !found {
-		lines = append(lines, "nameserver 127.0.0.1")
+		lines = append(lines, "nameserver "+IP.String())
 	}
 	data = []byte(strings.Join(lines, "\n"))
 	return c.fileManager.WriteToFile(string(constants.ResolvConf), data)