Unify nginx configuration

This creates a simple base configuration skeleton, that other configuration can be easily loaded into.

ansible/roles/qbittorrent/files/nginx.conf

@@ -1,28 +1,11 @@
-worker_processes  auto;
-
-events {
-    worker_connections  1024;
-}
-
-http {
-    include       mime.types;
-    default_type  application/octet-stream;
-
-    sendfile        on;
-    tcp_nopush     on;
-
-    keepalive_timeout  65;
+server {
+    listen 80;
 
     gzip  off;
     gzip_static off;
 
-    server {
-        listen 80;
+    root /mnt/downloads;
 
-        root /mnt/downloads;
-
-
-        autoindex on;
-        autoindex_exact_size off;
-    }
+    autoindex on;
+    autoindex_exact_size off;
 }