feat: update TLS configuration (#124)

Newer versions of `f2` support multiple domains using SNI, so we need to
upgrade to that. This will fail to reconcile on the live instance but
we'll bring up another one that supports the changes.

This change:
* Adds the `domains` property with `opentracker.app` in it

f2/config.yaml

@@ -3,14 +3,16 @@ alb:
   port: 443
   reconciliation: /reconcile
   tls:
-    cert_file:
-      location: s3
-      bucket: configuration-68f6c7
-      key: f2/fullchain.pem
-    key_file:
-      location: s3
-      bucket: configuration-68f6c7
-      key: f2/privkey.pem
+    domains:
+      opentracker.app:
+        cert_file:
+          location: s3
+          bucket: configuration-68f6c7
+          key: f2/fullchain.pem
+        key_file:
+          location: s3
+          bucket: configuration-68f6c7
+          key: f2/privkey.pem
 
 secrets:
   private_key: