fix: 前端 HTTPS 构建用同源相对 API_BASE, 修复 acesimba.cloud 跨域导致同步失败/误判离线

diff --git a/frontend/.env.production b/frontend/.env.production
new file mode 100644 (file)
index 0000000..d72a602
--- /dev/null
+++ b/frontend/.env.production
@@ -0,0 +1 @@
+REACT_APP_API_BASE=