add middleware for CORS and mode configuration

middleware/cors.go

@@ -0,0 +1,18 @@
+package middleware
+
+import (
+	"github.com/gin-contrib/cors"
+	"github.com/gin-gonic/gin"
+)
+
+func Cors() gin.HandlerFunc {
+	return cors.New(cors.Config{
+		AllowAllOrigins: true,
+		AllowHeaders: []string{
+			"Origin", "Content-Length", "Content-Type", "Workspace", "Request-Id", "Authorization", "Token",
+		},
+		AllowMethods: []string{
+			"GET", "POST", "PUT", "DELETE", "HEAD", "OPTIONS",
+		},
+	})
+}