nginx.conf

server {
    listen 80;
    listen [::]:80;
    server_name _;
    gzip on;
    gzip_min_length 1k;
    gzip_comp_level 9;
    gzip_types text/plain text/css text/javascript application/json application/javascript application/x-javascript application/xml;
    gzip_vary on;
    gzip_disable "MSIE [1-6]\.";
    resolver $NAMESERVERS ipv6=off;
    root /usr/share/nginx/html;
    include /etc/nginx/mime.types;
    location / {
        index  index.html;
    }

    location ^~/api/ {
        if ($request_uri ~* ^/api/(.*)$) {
            proxy_pass http://host.docker.internal:8840/$1;
        }
        #proxy_pass http://host.docker.internal:8840/;
        proxy_set_header X-Forwarded-Proto $scheme;
        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_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_connect_timeout   1;
        proxy_buffering off;
        chunked_transfer_encoding off;
        proxy_cache off;
        proxy_send_timeout      30m;
        proxy_read_timeout      30m;
        client_max_body_size    500m;
    }
}