fix: mount nginx.conf, add proxy_pass_request_headers on

sources/python/main.py

@@ -72,6 +72,7 @@ docker run -d \\
   -e WALLARM_API_HOST={api_host} \\
   -e WALLARM_MODE={mode} \\
   -e NGINX_BACKEND={upstream} \\
+  -v {host_dir}/nginx.conf:/etc/nginx/http.d/default.conf:ro \\
   {WALLARM_IMAGE}
 sleep 3
 docker ps --filter name={container} --format '{{{{.Status}}}}'
@@ -91,6 +92,9 @@ server {{
     proxy_read_timeout 300s;
     proxy_send_timeout 300s;
 
+    # Pass all headers through — preserve auth cookies
+    proxy_pass_request_headers on;
+
     location /wallarm-status {{
         wallarm_status on;
         allow 127.0.0.0/8;