chore: update home page to link to new discourse

See #384

views/home.pug

@@ -9,7 +9,10 @@ block content
         h1 ECMAScript Discussion Archives
     .row
       .col-md-8.col-md-offset-2
-        p This site aims to provide an easily browsable, nicely formatted archive of all the email correspondence on the [email protected] mailing list.
+        p.
+          This site is an archive of the esdiscuss mailing list on which JavaScript syntax and features were discussed.
+          It is no longer active, but you may still find these archived discussions interesting. Discussion has now moved
+          to #[a(href='https://es.discourse.group') Discourse].
     .row
       .col-md-4.col-md-offset-2
         a(href='/1').btn.btn-lg.btn-primary.btn-block
@@ -21,6 +24,6 @@ block content
           |   View Notes
     .row(style="margin-top: 30px;")
       .col-md-8.col-md-offset-2
-        a(href='https://mail.mozilla.org/listinfo/es-discuss').btn.btn-lg.btn-primary.btn-block
+        a(href='https://es.discourse.group').btn.btn-lg.btn-primary.btn-block
           i.icon-star
-          |   Subscribe
+          |   View New Dicussion Forum