nginx.config

server {
    listen 443 default_server;
    listen [::]:443 default_server;
    # We want the root folder to point at index.html
    root /var/www/build;
    index index.html index.htm index.nginx-debian.html;

    server_name _;

    location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        try_files $uri /index.html $uri/ =404;
    }

    location /* {
        proxy_pass http://localhost:8000;
    }
} 


  GNU nano 5.8                                                                                          default                                                                                                    
server {
    listen 80 default_server;
    listen [::]:80 default_server;
    # We want the root folder to point at index.html
    root /var/www/build;
    index index.html index.htm index.nginx-debian.html;

    server_name _;

    location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        try_files $uri /index.html $uri/ =404;
    }

    location /* {
        proxy_pass http://localhost:8000;
    }
} server {
    listen 443 ssl http2 default_server;
    listen [::]:443 ssl http2 default_server;
    include ../snippets/self-signed.conf;
}