location /api-dev {                                                         
    proxy_pass http://localhost:3001;
    rewrite ^/api-dev/(.*)$ /$1 break;
}  
location /api-prod {                                                         
    proxy_pass http://localhost:3002;
    rewrite ^/api-prod/(.*)$ /$1 break;
} 
location /api-test {                                                         
    proxy_pass http://localhost:3003;
    rewrite ^/api-test/(.*)$ /$1 break;
}