add README

README.md

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+==in progress==
+
+# Docker Nextcloud mit Mariadb und fpm
+
+Anleitung: https://github.com/nextcloud/docker
+
+## Anwendung bedienen
+Nextcloud starten
+```
+cd /path/to/deploy/folder
+docker-compose up -d
+```
+Nextcloud stoppen
+```
+docker-compose down
+```
+Nextcloud aktualisieren
+```
+docker-compose down
+docker-compose pull
+docker-compose up -d
+```
+## occ
+docker
+```
+docker exec --user www-data CONTAINER_ID php occ
+```
+docker-compose
+```
+docker-compose exec --user www-data app php occ
+```
+
+## Datenbank
+MySQL import
+```
+docker exec -i nextcloud-db mysql -uroot -pnextcloud nextcloud < SQLFILE.sql
+```
+MySQL Dump
+```
+mysqldump -u root -pnextcloud nextcloud > SQLFILE.sql
+```
+
+## Backup