docs: Further updates & fixes to the nginx docs

Thanks to @redshiftltd for test driving the nginx setup, and providing
very valuable feedback & the updated configurations.

Signed-off-by: Gergely Nagy <me@gergo.csillger.hu>

docs/content/deploying/nginx.md

@@ -32,6 +32,8 @@ map $http_user_agent $badagent {
 }
 ```
 
+You can put this into a file common between all servers, like `/etc/nginx/conf.d/iocaine.conf`, because on many distributions, any `*.conf` file under `/etc/nginx/conf.d` will get automatically included. This way, you can share it between servers, without having to include it from multiple files manually.
+
 Within the `server` block, we'll rewrite the URL if find a match on `$badagent`, and the proxy *that* location through to `iocaine`. The reason we need the `rewrite` is that `nginx` does not support `proxy_pass` within an `if` block. In the end, our `server` block will look like this:
 
 
@@ -43,7 +45,7 @@ server {
   }
   location /ai {
     proxy_set_header Host $host;
-    proxy_pass 127.0.0.1:42069;
+    proxy_pass http://127.0.0.1:42069;
   }
   location / {
     proxy_set_header Host $host;