Cyberghost support (#168)

* Host finder CLI for cyberghost
* Resolver program updated with Cyberghost data
* Gluetun cli clientkey subcommand

internal/settings/cyberghost.go

@@ -0,0 +1,54 @@
+package settings
+
+import (
+	"strings"
+
+	"github.com/qdm12/private-internet-access-docker/internal/models"
+	"github.com/qdm12/private-internet-access-docker/internal/params"
+)
+
+// Windscribe contains the settings to connect to a Windscribe server
+type Cyberghost struct {
+	User      string
+	Password  string
+	ClientKey string
+	Group     models.CyberghostGroup
+	Region    models.CyberghostRegion
+}
+
+func (c *Cyberghost) String() string {
+	settingsList := []string{
+		"Cyberghost settings:",
+		"User: [redacted]",
+		"Password: [redacted]",
+		"ClientKey: [redacted]",
+		"Group: " + string(c.Group),
+		"Region: " + string(c.Region),
+	}
+	return strings.Join(settingsList, "\n |--")
+}
+
+// GetCyberghostSettings obtains Cyberghost settings from environment variables using the params package.
+func GetCyberghostSettings(paramsReader params.Reader) (settings Cyberghost, err error) {
+	settings.User, err = paramsReader.GetUser()
+	if err != nil {
+		return settings, err
+	}
+	settings.Password, err = paramsReader.GetPassword()
+	if err != nil {
+		return settings, err
+	}
+	settings.ClientKey, err = paramsReader.GetCyberghostClientKey()
+	if err != nil {
+		return settings, err
+	}
+	settings.Group, err = paramsReader.GetCyberghostGroup()
+	if err != nil {
+		return settings, err
+	}
+	settings.Region, err = paramsReader.GetCyberghostRegion()
+	if err != nil {
+		return settings, err
+	}
+	return settings, nil
+}