Q:

How to Set Regular Expression for Nginx Location Block and Proxy Pass?

I would like to ask about some configurations for Nginx; How to setup regular expression in Nginx location block? this is my configuration
location ~ ^/web/api/v1/([A-Za-z]+) {
    proxy_pass http://localhost:5000/$1;
}

So, the use case for this config is when i type localhost/web/api/v1/apple it will routed to localhost:5000/apple, localhost/web/api/v1/pineapple it will routed to localhost:5000/pineapple, and so on. Note: the apple and pineapple only example path name.
Thank You

A:

This answer credit to @Richard Smith;
I am change the config become:
location ~ ^/web/api/v1/([A-Za-z]+)$ {
   proxy_pass http://127.0.0.1:5000/$1;
}

localhost become 127.0.0.1

