Remove jobs from hiring page.

content/hiring/2020-10-project-manager.md

 ---
 title: Project Manager
 date: 2020-10-01T00:00:02+00:00
+hide: 1
 ---
 
 We're looking for a part-time Project Manager to join a small, friendly

content/hiring/2020-10-qa-tester.md

 ---
 title: QA Tester
 date: 2020-10-01T00:00:00+00:00
+hide: 1
 ---
 
 We're looking for a part-time QA Tester to join a small, friendly team

content/hiring/2020-10-senior-developer.md

 ---
 title: Senior Java/Android Developer
 date: 2020-10-01T00:00:01+00:00
+hide: 1
 ---
 
 We're looking for a Senior Java/Android Developer to join a small, friendly

content/hiring/_index.md

@@ -3,4 +3,15 @@ aliases:
 - /hiring.html
 title: Jobs
 ---
-We're looking for the following people to work on Briar:
+We don't currently have any paid positions available. If you'd like to
+hear about future vacancies, please email {{<contactemail>}}.
+ 
+If you're interested in getting involved as a volunteer, please [join
+the development mailing
+list](https://lists.sourceforge.net/lists/listinfo/briar-devel)
+or email {{<contactemail>}}.
+You can also join our chat channel using
+[IRC](irc://chat.freenode.net/briar) (#briar on freenode) or
+[Matrix](https://matrix.to/#/#freenode_#briar:matrix.org).
+Translators can volunteer through our [Transifex
+project](https://transifex.com/otf/briar).