Format and typo

documentation/recover_from_backup.md

-upload the key
+```
+# upload the key
 gpg --import .gnupg/secring.gpg
 source /etc/environment
 domain=example.org
 docker run -it --rm --name test -h backup.container -v /root:/root -v /data/domains/$domain:/backup indiepaas/duplicity sftp://${BACKUP_DESTINATION}/$domain /backup
 
 systemctl start service
-docker run -it --rm --name mysqlinport -v /data/domains/nao-ao-ttip.pt/mysql/dump.sql:/tmp/dump.sql --link mysql-nao-ao-ttip.pt:db indiepaas/mysql /bin/bash
+docker run -it --rm --name mysqlinport -v /data/domains/$domain/mysql/dump.sql:/tmp/dump.sql --link mysql-$domain:db indiepaas/mysql /bin/bash
 mysql -u admin -p -h db < /tmp/dump.sql
+```