Proxy NGINX Novu self-hosting

server {
    listen 80;

    client_max_body_size 20M;

    server_name mydns.com.br xxx.xxx.xxx.xxx;

    access_log  /var/log/nginx/novu_access.log;
    error_log /var/log/nginx/novu_error.log;

    location / {
            proxy_pass http://localhost:4200;
            proxy_http_version 1.1;
            if ($request_method = OPTIONS) {
              add_header 'Access-Control-Allow-Origin' '*';
              add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE';
              add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
              return 200;
            }
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
    }

    location /api {
            proxy_pass http://localhost:3000/api;
            proxy_http_version 1.1;
            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE';
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
    }

    location /ws {
            proxy_pass http://localhost:3002/ws;
            proxy_http_version 1.1;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
    }

    location /widget {
            proxy_pass http://localhost:4500/widget;
            proxy_http_version 1.1;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
    }

    location /socket.io/ {
            proxy_pass http://localhost:3002;
            proxy_http_version 1.1;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
    }

# proxy_headers_hash_max_size 512;
# proxy_headers_hash_bucket_size 128;
}