nginx.conf

events {
    worker_connections  1024;
}

http {

  upstream docker-registry {
    server registry:5000;
  }

  ## Set a variable to help us decide if we need to add the
  ## 'Docker-Distribution-Api-Version' header.
  ## The registry always sets this header.
  ## In the case of nginx performing auth, the header is unset
  ## since nginx is auth-ing before proxying.
  map $upstream_http_docker_distribution_api_version $docker_distribution_api_version {
    '' 'registry/2.0';
  }

  server {
    listen 443 ssl;
    server_name ${PRODUCTION_SERVER_NAME};

    # SSL
    ssl_certificate /etc/nginx/certs/domain.crt;
    ssl_certificate_key /etc/nginx/certs/domain.key;

    # Recommendations from https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
    ssl_protocols TLSv1.1 TLSv1.2;
    ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;

    # disable any limits to avoid HTTP 413 for large image uploads
    client_max_body_size 0;

    # required to avoid HTTP 411: see Issue #1486 (https://github.com/moby/moby/issues/1486)
    chunked_transfer_encoding on;

    location /v2/ {
      # Do not allow connections from docker 1.5 and earlier
      # docker pre-1.6.0 did not properly set the user agent on ping, catch "Go *" user agents
      if ($http_user_agent ~ "^(docker\/1\.(3|4|5(?!\.[0-9]-dev))|Go ).*$" ) {
        return 404;
      }

      # To add basic authentication to v2 use auth_basic setting.
      auth_basic "Registry realm";
      auth_basic_user_file /etc/nginx/conf.d/nginx.htpasswd;

      ## If $docker_distribution_api_version is empty, the header is not added.
      ## See the map directive above where this variable is defined.
      add_header 'Docker-Distribution-Api-Version' $docker_distribution_api_version always;

      proxy_pass                          http://docker-registry;
      proxy_set_header  Host              $http_host;   # required for docker client's sake
      proxy_set_header  X-Real-IP         $remote_addr; # pass on real client's IP
      proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
      proxy_set_header  X-Forwarded-Proto $scheme;
      proxy_read_timeout                  900;
    }

    location / {
      resolver 127.0.0.11 valid=30s;
      set $upstream_production frontend_production;
      proxy_set_header Host $host;
      proxy_pass http://$upstream_production:80;
    }

    location /api/ {
      resolver 127.0.0.11 valid=30s;
      set $upstream_production frontend_production;
      proxy_set_header Host $host;
      proxy_pass http://$upstream_production:80/$request_uri;
    }
  }

  server {
    listen 443 ssl;
    server_name ${STAGING_SERVER_NAME};

    # SSL
    ssl_certificate /etc/nginx/certs/domain.crt;
    ssl_certificate_key /etc/nginx/certs/domain.key;
    ssl_protocols TLSv1.1 TLSv1.2;
    ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;

    location / {
      resolver 127.0.0.11 valid=30s;
      set $upstream_staging frontend_staging;
      proxy_set_header Host $host;
      proxy_pass http://$upstream_staging:80;
    }

    location /api/ {
      resolver 127.0.0.11 valid=30s;
      set $upstream_staging frontend_staging;
      proxy_set_header Host $host;
      proxy_pass http://$upstream_staging:80/$request_uri;
    }
  }
}