'How to configure the Nginx for Single Page Application?

I used the React as the frontend and the routes are listed below:

/a
/a/1
/b

And used the Nginx to establish the reverse proxy, but I have to add a prefix route /app. So my new routes will be like:

/app/a
/app/a/1
/app/b

I have tried this, but it didn't work

location ^~/app/ {
    rewrite ^/app/(.*)$ /$1 break;
    alias /www/;
    try_files $uri $uri/ /index.html;
    index   index.html;
}

How could I configure the Nginx?

nginx

Sources

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