Add aurto server for AUR caching

ansible/roles/aurto/files/nginx.conf

@@ -0,0 +1,43 @@
+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;
+
+        root /var/cache/pacman/aurto;
+
+        auth_basic "Restricted";
+        auth_basic_user_file /etc/nginx/.htpasswd;
+
+        # gzip
+        gzip on;
+        gzip_types *;
+
+        # IP detection
+        set_real_ip_from  0.0.0.0/0;
+        real_ip_header X-Forwarded-For;
+
+        # Kick malicious clients sooner
+        client_header_timeout 10s;
+        client_body_timeout 10s;
+        client_max_body_size 128k;
+        reset_timedout_connection on;
+        sendfile_max_chunk 1m;
+        keepalive_timeout 65;
+
+        # Ensure 403s respond with 404
+        error_page 403 /dev/null;
+    }
+}