Update Gitea config to mention SSH_DOMAIN

src/hosting/gitea.md

@@ -149,6 +149,8 @@ server {
 	- `repository` > `ENABLE_PUSH_CREATE_ORG = true`
 	- `cron.repo_health_check` > `TIMEOUT = 90s`
 	- `service` > `REQUIRE_SIGNIN_VIEW = false` (updated 4/2023)
+	- `server` > `SSH_DOMAIN = git.domain.com` (updated 8/2023)
+		- `DOMAIN` is fine as `localhost` since `ROOT_URL` is set.
 - `sudo nano /etc/nginx/nginx.conf`
 	- Add `client_max_body_size 100M;` to gitea server section (to allow for larger files)
 	- `sudo nginx -t`