dev_1.0.0_xuxt_2 更新反向代理，打包镜像，以及README文档 (#28)

Co-authored-by: xiuting.xu <xiutingxt.xu@gmail.com>
Reviewed-on: #28
Reviewed-by: yuyr <yuyr@zgclab.edu.cn>
Reviewed-by: huhy <husteryezi@163.com>
Reviewed-by: sundapeng <sundp@mail.zgclab.edu.cn>

src/web/build_tools/proxy/conf.d/alert.conf

@@ -3,6 +3,7 @@ server {
     server_name alertmanager.alert.argus.com;
 
     location / {
-        proxy_pass http://alertmanager.alert.argus.com:9093;
+        set $alert_backend http://alertmanager.alert.argus.com:9093;
+        proxy_pass $alert_backend;
     }
 }