How to set up Nginx redirects in Heroku?

Question

Nginx

The root of the project contains index.php and nginx_app.conf.
Content of nginx_app.conf:

location / {
                try_files $uri $uri/ =404;
                rewrite ^(.+)$ /index.php?key=$1;
        }

I run the command in the console

vendor/bin/heroku-php-nginx -C nginx_app.conf

As a result, output

Using Nginx server-level configuration include 'nginx_app.conf'
Optimizing defaults for 1X dyno...
4 processes at 128MB memory limit.
Starting php-fpm...
Starting nginx...

Going to my site https://mysite.herokuapp.com/jhkjh shows 404 not found when it should return index.php.
On localhost, with these settings, everything works correctly.

Answer 1

location ~/(.*)$ {
    try_files $uri $uri/ /index.php?key=$1;
}

Or like this:

location / {
    try_files $uri $uri/ /index.php?key=$uri;
}