Add letsencrypt endpoint helper.
diff --git a/nginx/files/_letsencrypt.conf b/nginx/files/_letsencrypt.conf
new file mode 100644
index 0000000..94ca952
--- /dev/null
+++ b/nginx/files/_letsencrypt.conf
@@ -0,0 +1,6 @@
+location /.well-known/acme-challenge/ {
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header Host $http_host;
+    proxy_redirect off;
+    proxy_pass http://{{ site.host.name }}:9999/.well-known/acme-challenge/;
+}
\ No newline at end of file