fix: use NGINX_BACKEND env var (image auto-generates nginx)

sources/python/main.py

@@ -57,7 +57,8 @@ def deploy_container(name, token, cloud, port, upstream_ip, upstream_port, label
     host_dir = f"{BASE}/{name}"
     os.makedirs(host_dir, exist_ok=True)
 
-    # Generate start.sh (declarative config + startup in one file)
+    # Generate start.sh
+    upstream = f"{upstream_ip}:{upstream_port}"
     start_path = f"{host_dir}/start.sh"
     with open(start_path, "w") as f:
         f.write(f"""#!/bin/bash
@@ -70,18 +71,20 @@ docker run -d \\
   -e WALLARM_API_TOKEN='{token}' \\
   -e WALLARM_API_HOST={api_host} \\
   -e WALLARM_MODE={mode} \\
-  -v {host_dir}/nginx.conf:/etc/nginx/http.d/default.conf:ro \\
+  -e NGINX_BACKEND={upstream} \\
   {WALLARM_IMAGE}
 sleep 3
 docker ps --filter name={container} --format '{{{{.Status}}}}'
 """)
     os.chmod(start_path, 0o755)
 
-    # Write nginx.conf with production defaults
+    # Nginx config for optional customization
     nginx_conf = f"{host_dir}/nginx.conf"
     if not os.path.exists(nginx_conf):
         with open(nginx_conf, "w") as f:
-            f.write(f"""server {{
+            f.write(f"""# Wallarm node: {name}
+# Mount with: -v $(pwd)/nginx.conf:/etc/nginx/http.d/default.conf:ro
+server {{
     listen 80;
     server_name _;
     client_max_body_size 1024m;
@@ -95,7 +98,7 @@ docker ps --filter name={container} --format '{{{{.Status}}}}'
     }}
 
     location / {{
-        proxy_pass http://{upstream_ip}:{upstream_port};
+        proxy_pass http://{upstream};
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;