React / Kestrel settings for admin folder

Hello,

I'm trying to setup new location rule for the "admin" folder for my reactjs SPA application. It uses Kestrel as a web server and Nginx as a proxy.

I have already one configuration, which is working fine with redirection all requests to the index.html file, which contains necessary javascript logic:

location /favicon.ico {
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
}

location ~ ^/(fonts|img|js|lib|script|style)/ {
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
}

location / {
try_files $uri /index.html;
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
}

Now I need to add rule for /admin/ folder which will route all requests to the /admin/index.html, once /admin/ is a part of the path, but the following is not work:

location /admin/ {
try_files /index.html $uri;
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
}

What I'm doing wrong?

Thanks,
Anton