debugging NGINX configuration for Jupyter

docker-compose.yml

jupyter:
  image: jupyter/datascience-notebook
  environment:
    - PASSWORD=${PASSWORD}


nginx:  
  image: nginx
  links: 
    - jupyter
  volumes:
    - ./nginx.conf:/etc/nginx/nginx.conf
    - ./letsencrypt.crt:/data/cert.crt
    - /letsencrypt.key:/data/key.key
  ports:
    - 80:80
    - 443:443

nginx.conf

## Based on: https://github.com/calpolydatascience/jupyterhub-deploy-data301/blob/master/roles/nginx/templates/nginx.conf.j2
user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {

  include /etc/nginx/mime.types;
  default_type application/octet-stream;

  map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

  upstream jupyter {
      server jupyter:8888 fail_timeout=0;
  }


    server {
        listen 80;
        server_name xsede.carlboettiger.info;
        rewrite        ^ https://$host$request_uri? permanent;
    }

    server {
        listen 443;

        client_max_body_size 50M;
        server_name xsede.carlboettiger.info;

        ssl on;
        ssl_certificate /data/cert.crt;
        ssl_certificate_key /data/key.key;

        ssl_ciphers "AES128+EECDH:AES128+EDH";
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        ssl_session_cache shared:SSL:10m;
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        add_header X-Content-Type-Options nosniff;
        ssl_stapling on; # Requires nginx >= 1.3.7
        ssl_stapling_verify on; # Requires nginx => 1.3.7
        resolver_timeout 5s;


        # Expose logs to "docker logs".
        # See https://github.com/nginxinc/docker-nginx/blob/master/Dockerfile#L12-L14
        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;

        location / {
            proxy_pass http://jupyter;

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
     location ~* /(api/kernels/[^/]+/(channels|iopub|shell|stdin)|terminals/websocket)/? {
            proxy_pass http://jupyter;

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            # WebSocket support
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;

        }
    }
}