nginx configure default error pages - nginx

Question

First off, first time nginx user. So, I'm still learning the differences from Apache and nginx.
I have a stock install of nginx. (apt-get install nginx-full) I modified the default configuration found at '/etc/nginx/sites-enabled/default' for my setup. However, error pages just don't work. My docroot is /server/www, and my error pages are located within the directory /server/errors/. Below is my config.
server {
listen 80 default_server;
listen [::]:80 default_server ipv6only=on;
root /server/www;
index index.html;
server_name website.com;
location / {
try_files $uri $uri/ /index.html;
}
error_page 403 404 405 /40x.html;
location /40x.html {
root /server/errors;
internal;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /server/errors;
internal;
}
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}
location ~ /\.ht {
deny all;
}
}
All pages that should generate a 403 or 404 page, just load the index.html file. I believe the something is probably happening with 500 errors, however, that's a bit harder to generate.
Also, if it's relevant, I moved the error pages above docroot, but they weren't working before that. I made that move as the 'internal' flag didn't appear to make the pages internal as the documentation claimed, as I could still access them directly.
Any advise/help you could give would be great!

Answer 1

The error issue was related to the location / having an end value of /index.html. Essentially, nginx was first trying the uri as a file, then as a directory, and then reverting to index.html. Instead I wanted it to return a 404. So I changed it to the below and now it works.
location / {
try_files $uri $uri/ =404;
}