nginx always adding trailing slash after domain - nginx

Question

I've spent forever searching and I can't see that I'm doing anything wrong.
Basically I have two domains and want to route to a backend service depending on which one is visited.
clientkey.local
clientkey.strapi.local
When I visit each of these domains, it's rewriting the urls as:
clientkey.local/
clientkey.strapi.local/
There is no point to adding the extra slashes if I'm just visiting the base domain. I can add the trailing slash if I want and still end up on the home page, but it shouldn't redirect me there automatically. Below is my nginx config.
Any ideas? I'm using docker-compose if that matters. I feel like I'm missing something obvious.
worker_processes 4;
events { worker_connections 1024; }
http {
upstream strapi_servers {
server strapi:1337;
}
upstream gallery_servers {
server gallery;
}
server {
listen 80;
server_name clientkey.strapi.local;
location / {
proxy_pass http://strapi_servers;
proxy_http_version 1.1;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
proxy_pass_request_headers on;
}
}
server {
listen 80;
server_name clientkey.local;
location / {
proxy_pass http://gallery_servers;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
}
}
}

Answer 1

Quick testing reveals that slash is not hidden for non-public TLD websites (Chromium/Chrome).
In other words, if the TLD isn't real, then slash is not being ommited.
example.local - slash shown
example.anyting-non-real - slash shown
example.com - slash hidden