Version 3 starter

backend/internal/api/middleware/access_control.go

@@ -0,0 +1,13 @@
+package middleware
+
+import (
+	"net/http"
+)
+
+// AccessControl sets http headers for responses
+func AccessControl(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		next.ServeHTTP(w, r)
+	})
+}