add cors middleware

backend/middlewares/cors.go

@@ -0,0 +1,17 @@
+package middlewares
+
+import (
+	"net/http"
+)
+
+func Cors(handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		origin := request.Header.Get("Origin")
+
+		switch origin {
+		case "http://localhost:5173", "http://localhost", "https://alai.cromer.cl":
+			writer.Header().Set("Access-Control-Allow-Origin", origin)
+			writer.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+		}
+	})
+}