chore: remove unused nginx.conf file

It was moved to `nginx/default.conf` a long time ago, so I'm not sure why this one is still here

nginx.conf

@@ -1,15 +0,0 @@
-server {
-    listen 80;
-    server_name vert;
-
-    root /usr/share/nginx/html;
-    index index.html;
-
-    client_max_body_size 10M;
-
-    location / {
-        try_files $uri $uri/ /index.html;
-    }
-    
-    error_page 404 /index.html;
-}