r/formsubmit: Deploy formsubmit app

*formsubmit* is a simple, customizable HTML for submission handler.  I
designed it for Tabitha to use to collect information from forms on her
websites.  Notably, we will use it for the RSVP page on our wedding
invitation site.

roles/formsubmit/handlers/main.yml

@@ -0,0 +1,8 @@
+- name: reload systemd
+  systemd:
+    daemon_reload: true
+
+- name: restart formsubmit
+  service:
+    name: formsubmit
+    state: restarted