Update back-up restore example for 1.13 changes (#14374)

Signed-off-by: Daniël Vos <danielvos@outlook.com>

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

docs/content/doc/usage/backup-and-restore.zh-tw.md

@@ -43,3 +43,23 @@ Gitea 目前支援 `dump` 指令，用來將資料備份成 zip 檔案，後續
 ## 還原指令 (`restore`)
 
 持續更新中: 此文件尚未完成.
+
+例:
+```sh
+unzip gitea-dump-1610949662.zip
+cd gitea-dump-1610949662
+mv data/conf/app.ini /etc/gitea/conf/app.ini
+mv data/* /var/lib/gitea/data/
+mv log/* /var/lib/gitea/log/
+mv repos/* /var/lib/gitea/repositories/
+chown -R gitea:gitea /etc/gitea/conf/app.ini /var/lib/gitea
+
+# mysql
+mysql --default-character-set=utf8mb4 -u$USER -p$PASS $DATABASE <gitea-db.sql
+# sqlite3
+sqlite3 $DATABASE_PATH <gitea-db.sql
+# postgres
+psql -U $USER -d $DATABASE < gitea-db.sql
+
+service gitea restart
+```