nginx-ElasticBeanstalk上的Websocket提供404

我正在尝试将Websocket服务器部署到Elastic Beanstalk.
我有一个既包含nginx又包含jar服务器的Docker容器,其中nginx只是进行转发. nginx.conf是这样的：

listen 80;
location /ws/ {             # <-- this part only works locally
    proxy_pass http://127.0.0.1:8090/;     # jar handles websockets on port 8090
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
}
location / {                     # <-- this part works locally and on ElasticBeanstalk
    proxy_pass http://127.0.0.1:8080/;   # jar handles http requests on port 8080
    proxy_set_header   Host $host;
    proxy_set_header   X-Real-IP $remote_addr;
    proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header   X-Forwarded-Host $server_name;
}

我可以在本地运行此docker,并且一切正常-可以处理http请求,并且可以使用ws：// localhost：80 / ws /连接websocket.但是,当我部署到Elastic Beanstalk时,http请求仍然可以,但是尝试在ws：//myjunk.elasticbeanstalk.com：80 / ws /上连接websockets会出现404错误.我是否需要其他东西才能在Elastic Beanstalk上允许websocket？