[fix]:[FL-196][nginx 动态 DNS 解析 + 部署流程中重启 nginx，防止容器重启后 502]

deploy/pro-deploy/nginx.conf

@@ -4,8 +4,13 @@ server {
 
   client_max_body_size 200m;
 
+  # Docker internal DNS resolver — forces nginx to re-resolve service names
+  # at runtime instead of caching IPs at startup (fixes 502 after container restart)
+  resolver 127.0.0.11 valid=10s;
+
   location /api/v1/ws {
-    proxy_pass http://api:8000;
+    set $backend_api "http://api:8000";
+    proxy_pass $backend_api;
     proxy_http_version 1.1;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
@@ -18,7 +23,8 @@ server {
   }
 
   location /api/ {
-    proxy_pass http://api:8000;
+    set $backend_api "http://api:8000";
+    proxy_pass $backend_api;
     proxy_http_version 1.1;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
@@ -29,7 +35,8 @@ server {
   }
 
   location / {
-    proxy_pass http://web:3000;
+    set $backend_web "http://web:3000";
+    proxy_pass $backend_web;
     proxy_http_version 1.1;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;