Nginx forwards socket messages

upstream mapserver{
    
    
  server 192.33.6.13:8080;
}
map $http_upgrade $connection_upgrade {
    
    
    default upgrade;
    ''      close;
}
server{
    
    
    listen 6007;
    error_log  /var/log/nginx/error_6007.log warn;
    access_log  /var/log/nginx/access_6007.log  main;
    location / {
    
    
        proxy_pass http://192.33.6.150:8812;
        include conf.d/conf.d/proxy.conf;
    }
    location /map {
    
    
        proxy_pass http://mapserver/map;
        include conf.d/conf.d/proxy.conf;
    }
    location /bddptc {
    
    
        proxy_pass  http://192.33.6.67;
        include conf.d/conf.d/proxy.conf;
    }
    location /socket.io {
    
    
        proxy_pass http://192.33.6.67:5030/socket.io;
        proxy_set_header X-Real_IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X_Forward_For $proxy_add_x_forwarded_for;
        proxy_http_version 1.1;
        proxy_buffering off;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
    }
}