fix(gitea): bind SSH explicitly to IPv4 to avoid conflict with sshd on IPv6

Docker binds to both [::]:22 and 0.0.0.0:22 without an explicit IP,
conflicting with sshd on [::]:22.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

gitea/compose.yml

@@ -37,7 +37,7 @@ services:
       GITEA__ui__DEFAULT_THEME: nord
       GITEA__ui__ENABLE_FEED: "true"
     ports:
-      - "22:2222"
+      - "82.165.139.220:22:2222"
     volumes:
       - ../.data/gitea/data:/data
       - ../.data/gitea/config:/etc/gitea