Nginx server configuration hosting an Angular app and proxying requests of the API calls

Question

How one is able to proxy the requests (or the API calls) of an Angular app hosted on Nginx towards backend running on a docker container having another port value (the Angular app is also dokcerized)?

Currently, I have an nginx.conf file and copying it to /etc/nginx/conf.d/default.conf, but cannot get the results from the backend. This is nginx.conf file:

server {
   listen 80;
   server_name localhost;

   root /usr/share/nginx/html;
   index index.html index.htm;

   location / {
      try_files $uri $uri/ /index.html = 404;
    }

    location /api/ {
       proxy_pass http://0.0.0.0:8080/api/;

    }

}