nginx configuration for portainer with multiple websites reverse proxied to different ports based on hostname

nginx.conf

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;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;

    # List of application servers
    upstream manage {
        server 172.17.0.2:9000;
    }

    upstream find3server {
        server 172.17.0.3:8003;
    }

    upstream find3mqtt {
        server 172.17.0.3:1883;
    }

    # Configuration for the servers
    server {

        # Running port
        listen 0.0.0.0:80;
        server_name manage.maps.goflo.in;

        # Proxying the connections connections
        location / {
            proxy_http_version 1.1;
            proxy_set_header   Connection "";
            proxy_pass         http://manage;
        }

        location /api/websocket/ {
            proxy_set_header   Upgrade $http_upgrade;
            proxy_set_header   Connection "upgrade";
            proxy_http_version 1.1;
            proxy_pass         http://manage/api/websocket/;
        }
    }
    server {

        # Running port
        listen 80;
        server_name beta.maps.goflo.in;

        # Proxying the connections connections
        location / {

            proxy_pass         http://find3server;
            proxy_redirect     off;
            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;

        }
    }

    server {

        # Running port
        listen 80;
        server_name mqtt.maps.goflo.in;

        # Proxying the connections connections
        location / {

            proxy_pass         http://find3mqtt;
            proxy_redirect     off;
            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;

        }
    }
}