restructured the project to comply community guideline, for others check release note

internal/proxy/fields/timeout.go

@@ -0,0 +1,18 @@
+package fields
+
+import (
+	"time"
+
+	E "github.com/yusing/go-proxy/internal/error"
+)
+
+func ValidateDurationPostitive(value string) (time.Duration, E.NestedError) {
+	d, err := time.ParseDuration(value)
+	if err != nil {
+		return 0, E.Invalid("duration", value)
+	}
+	if d < 0 {
+		return 0, E.Invalid("duration", "negative value")
+	}
+	return d, nil
+}