add

trading_assistant_api/common/httpx/cors.go

@@ -0,0 +1,19 @@
+package httpx
+
+import "net/http"
+
+func CORS() func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("Access-Control-Allow-Origin", "*")
+			w.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS")
+			w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
+			w.Header().Set("Access-Control-Max-Age", "86400")
+			if r.Method == http.MethodOptions {
+				w.WriteHeader(http.StatusNoContent)
+				return
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}