After the November upgrade of the server, the Friendica logo was not displayed on the landing page of Gitea. Turn out
1.) The `img` directory in the `custom` directory is now accessed as `assets/img` and not only `img`
2.) While the `home.tepl` file is still located in `/var/lib/gitea` the `img` directory now has to be in `/usr/share/gitea`
The problem may be caused in changes in the configuration file which had to be restored from a backup some month old.