Organize backend into product executable and shared Go modules

backend/shared/http/methods.go

@@ -0,0 +1,36 @@
+package api
+
+import "fmt"
+
+type HTTPMethod int
+
+const (
+	Get HTTPMethod = iota
+	Post
+	Put
+	Patch
+	Delete
+	Options
+	Head
+)
+
+func HTTPMethod2String(method HTTPMethod) string {
+	switch method {
+	case Get:
+		return "GET"
+	case Post:
+		return "POST"
+	case Put:
+		return "PUT"
+	case Delete:
+		return "DELETE"
+	case Patch:
+		return "PATCH"
+	case Options:
+		return "OPTIONS"
+	case Head:
+		return "HEAD"
+	default:
+		return fmt.Sprintf("unknown: %d", method)
+	}
+}