add templates for kontor-gin

kontor-gin/pkg/middleware/cors.go

@@ -0,0 +1,21 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// corsMiddleware adds CORS headers for cross-origin requests
+func CorsMiddleware(c *gin.Context) {
+	c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+	c.Writer.Header().Set("Access-Control-Allow-Methods", "GET, POST, PATCH, DELETE, OPTIONS")
+	c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+
+	if c.Request.Method == "OPTIONS" {
+		c.AbortWithStatus(http.StatusNoContent)
+		return
+	}
+
+	c.Next()
+}