Add server Options and rework flags a bit

internal/server/options.go

@@ -0,0 +1,60 @@
+package server
+
+import "time"
+
+type Options struct {
+	Port           int
+	Auth           Optional[AuthOptions]
+	Tls            Optional[TlsOptions]
+	UpdateInterval time.Duration
+}
+
+type Optional[v any] struct {
+	Enabled bool
+	value   v
+}
+
+func (o *Optional[v]) Get() v {
+	return o.value
+}
+
+func (o *Optional[v]) Set(value v) {
+	o.value = value
+	o.Enabled = true
+}
+
+func (o *Optional[v]) Apply(apply func(*v)) {
+	o.Enabled = true
+	apply(&o.value)
+}
+
+type AuthType int
+
+const (
+	Raw AuthType = iota
+	File
+)
+
+type AuthOptions struct {
+	// Secret Direct or Path to secret File
+	Secret   string
+	LoadType AuthType
+}
+
+type TlsOptions struct {
+	CertPath string
+	KeyPath  string
+}
+
+func NewDefaultOptions() Options {
+	return Options{
+		Port: 8080,
+		Auth: Optional[AuthOptions]{
+			Enabled: false,
+		},
+		Tls: Optional[TlsOptions]{
+			Enabled: false,
+		},
+		UpdateInterval: 15 * time.Minute,
+	}
+}