add LE support

build/sites/05-test_nonsecured.conf

@@ -8,6 +8,17 @@ server {
         try_files $uri $uri/ =404;        
     }
 
+    # process Let's Encrypt challenges
+    location ^~ /.well-known/acme-challenge {
+        # log requests for security reasons
+        access_log /var/log/nginx/LetsEncrypt_access.log main;
+        error_log /var/log/nginx/LetsEncrypt_error.log warn;
+
+        default_type text/plain;
+        root /usr/share/nginx/html/letsencrypt;
+        autoindex on;
+    }
+
     # error pages
     include /etc/nginx/errorpages.conf;
 }