How to set up 2 locations with proxy_pass?

Question

Nginx

Hello!
I'm trying to separate requests into api and dev . Each location proxies to its own application.
nginx config file:

server {
 listen 80;
 listen [::]:80;
 server_name some.domain;

 server_tokens off;
 root /var/www/html;

  location /api {
   proxy_pass_request_headers    on;
   proxy_pass http://localhost:1337;
   proxy_http_version 1.1;
   proxy_set_header Upgrade $http_upgrade;
   proxy_set_header Connection 'upgrade';
   proxy_set_header Host $host;
   proxy_cache_bypass $http_upgrade; 
 }

  location /dev {
   proxy_pass_request_headers    on;
   proxy_pass http://localhost:1338;
   proxy_http_version 1.1;
   proxy_set_header Upgrade $http_upgrade;
   proxy_set_header Connection 'upgrade';
   proxy_set_header Host $host;
   proxy_cache_bypass $http_upgrade; 
 }
}

Is it possible to share like this?
How to configure redirect uri to pass_proxy?
If I request some.domain/api/uri_1 , then localhost:1337/api/uri_1 is proxied , but I need it without /api.
I tried to do it through rewrite like this:

location /api {
   rewrite ^ /api([0-9a-z]*) $1 break;
   proxy_pass_request_headers    on;
   proxy_pass http://localhost:1337;
   proxy_http_version 1.1;
   proxy_set_header Upgrade $http_upgrade;
   proxy_set_header Connection 'upgrade';
   proxy_set_header Host $host;
   proxy_cache_bypass $http_upgrade; 
 }

As a result of the experiments, a whole day was spent and 404, 500, 502 from nginx and 404 from the application were received.
What should be the settings?

Answer 1

Add at the end / Like this
:
proxy_pass localhost:1338/;