role mastodon added

roles/mastodon/templates/letsencrypt.conf.j2

@@ -0,0 +1,8 @@
+# This starts a simple nginx for the letsencrypt acme challenge
+server {
+  listen 80;
+  listen [::]:80;
+  server_name {{ mastodon_host }};
+  root {{ mastodon_home }}/{{ mastodon_path }}/public;
+  location /.well-known/acme-challenge/ { allow all; }
+}