authelia: Add auth rule for HLC forms submit

The *hlcforms* application handles form submissions for the Hatch
Learning Center website.  It has various features for Tabitha that are
only accessible internally, but the form submission handler itself of
course needs to be accessible anonymously.

authelia/configuration.yml

@@ -46,6 +46,10 @@ access_control:
     - HEAD
     - OPTIONS
     policy: bypass
+  - domain: hlcforms.pyrocufflink.blue
+    resources:
+    - '^/submit/.*'
+    policy: bypass
 
 authentication_backend:
   ldap: