多租户：登录界面，根据 host 域名获取对应的租户编号

(cherry picked from commit 85ee558bef)

src/api/login/index.ts

@@ -27,6 +27,11 @@ export const getTenantIdByNameApi = (name: string) => {
   return request.get({ url: '/system/tenant/get-id-by-name?name=' + name })
 }
 
+// 使用租户域名，获得租户信息
+export const getTenantByWebsite = (website: string) => {
+  return request.get({ url: '/system/tenant/get-by-website?website=' + website })
+}
+
 // 登出
 export const loginOutApi = () => {
   return request.post({ url: '/system/auth/logout' })