Replace Rainloop with Nextcloud mail

A few services can't be configured automatically and need manual account creation to secure them:

**Rainloop**: It uses a hardcoded login by default, and can be accessed by anyone with a Nextcloud account.

To change it, visit `https://$DOMAIN/apps/rainloop/app/?admin` and enter username: `admin` and password: `12345`.

Go to the security tab to change the password.

**OnlyOffice**: Open `office.$DOMAIN`, then follow the instructions to add a new admin user. This

is only necessary if you chose to install OnlyOffice.

```

- `$DOMAIN`: File hosting with [Nextcloud](https://nextcloud.com/), email with

           [rainloop](https://www.rainloop.net/)

           [Nextcloud Mail](https://github.com/nextcloud/mail)

- `welcome.$DOMAIN`: Allows users to sign up for a new account (you can create signup links with

                   `bash /mnt/repo-base/scripts/generate-signup-link.sh`, account creation with this "self service" is only possible when such a link is generated)

- `office.$DOMAIN`: Create and edit office documents ([OnlyOffice](https://www.onlyoffice.com/))

docker-compose exec -T --user www-data nextcloud php /var/www/html/occ app:install tasks

docker-compose exec -T --user www-data nextcloud php /var/www/html/occ app:install notes

docker-compose exec -T --user www-data nextcloud php /var/www/html/occ app:install user_backend_sql_raw

docker-compose exec -T --user www-data nextcloud php /var/www/html/occ app:install rainloop

docker-compose exec -T --user www-data nextcloud php /var/www/html/occ config:app:set rainloop rainloop-autologin --value 1

docker-compose exec -T --user www-data nextcloud php /var/www/html/occ app:install mail

echo "Installing Nextcloud theme"

wget "https://gitlab.e.foundation/api/v4/projects/315/repository/archive.tar.gz" -O "/tmp/nextcloud-theme.tar.gz"

echo "Restarting Nextcloud container"

docker-compose restart nextcloud

echo "Configuring Rainloop"

mkdir -p "/mnt/repo-base/volumes/nextcloud/data/rainloop-storage/_data_/_default_/domains/"

echo "$ADD_DOMAINS" | tr "," "\n" | while read add_domain; do

    cp "templates/rainloop/domain-config.ini" "/mnt/repo-base/volumes/nextcloud/data/rainloop-storage/_data_/_default_/domains/$add_domain.ini"

done

chown www-data:www-data /mnt/repo-base/volumes/nextcloud/ -R

echo "Creating postfix database schema"

curl --silent -L https://mail.$DOMAIN/setup.php > /dev/null

  'loglevel' => 2,

  'preview_max_x' => 1024,

  'preview_max_y' => 1024,

  'app.mail.accounts.default' =>

    array (

      'email' => '%USERID%',

      'imapHost' => '@@@DOMAIN@@@',

      'imapPort' => 993,

      'imapSslMode' => 'ssl',

      'smtpHost' => '@@@DOMAIN@@@',

      'smtpPort' => 25,

      'smtpSslMode' => 'tls',

    ),

);

?>