Add jumpers.stormcloudhills.com subdomain vhost (HTTP + HTTPS)

Serve /uploads/scj as jumpers.stormcloudhills.com. HTTP redirects to
HTTPS; HTTPS vhost uses certs mounted at /etc/apache2/ssl. Adds named
ServerName to the default vhost so it remains the catch-all, scaffolds
the docroot, and documents expected cert filenames.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -1,3 +1,4 @@
 .env
-docker/apache/ssl/
+docker/apache/ssl/*
+!docker/apache/ssl/README.md
 docker/mysql/data/