Reference: https://docs.nginx.com/nginx/admin-guide/security-controls/configuring-http-basic-authentication/
Requirements: apache2-utils or httpd-tools
Use htpasswd utility and create a .htpasswd file, see reference
htpasswd -c /etc/nginx/.htpasswd usernamethatyouwant
chmod 644 /etc/nginx/.htpasswd
After that, just add lines in nginx conf
location / {
auth_basic "Backend Area";
auth_basic_user_file /etc/nginx/.htpasswd; ## path to your passwd file
## ...
## xyz code
##...
proxy_pass http://127.0.0.1:4000; ## Proxy port for your app
proxy_set_header Authorization ""; ## DONT FORGET THIS. reset the auth header
include proxy.inc;
}
Restart nginx now or test first using “nginx -t”