$ lsb_release -a

$ nginx -v

$ psql --version

$ sudo apt update && sudo apt upgrade

$ sudo apt install php-gd php-curl php-mbstring php-intl php-gmp php-bcmath php-xml php-imagick imagemagick php-zip php-bz2 php-fpm php-pgsql php-apcu

$ sudo -u www-data php --define apc.enable_cli=1

$ sudo systemctl status php7.4-fpm

$ sudo phpenmod pgsql
$ sudo systemctl restart php7.4-fpm.service 

$ sudo systemctl restart php7.4-fpm.service 

$ sudo wget https://download.nextcloud.com/server/releases/latest.tar.bz2

$ sudo tar -xjvf latest.tar.bz2

$ sudo chown -R www-data:www-data /var/www/nextcloud

$ sudo -u postgres psql

CREATE DATABASE %DbName%;

CREATE USER '%Username%' WITH PASSWORD '%Password%';

ALTER ROLE %Username% SET client_encoding TO 'utf8';

ALTER ROLE %Username% SET default_transaction_isolation TO 'read committed';

ALTER ROLE %Username% SET timezone TO 'Europe/Paris';

GRANT ALL PRIVILEGES ON DATABASE %DbName% TO %Username%;

$ chmod +x filename.sh

$ sudo ./newdatabase.sh

$ cd /opt
$ sudo mkdir -p nextcloud/data

$ sudo chown -R www-data:www-data /opt/nextcloud

$ cd /var/www/nextcloud
$ sudo -u www-data php occ  maintenance:install --database "pgsql" --database-name "%DbName%" --database-user "%Username%" --database-pass "%Password%" --admin-user "%NextcloudAdminUserName%" --admin-pass "%NextcloudAdminPassword%" --data-dir "/opt/nextcloud/data" --verbose

$ sudo touch /etc/nginx/sites-availables/nextcloud
$ sudo ln -s /etc/nginx/sites-available/nextcloud /etc/nginx/sites-enabled

server {    
    server_name %maybeyoursubdomain.yourdomain.topleveldomain%;

    # Add headers to serve security related headers
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Robots-Tag none;
    add_header X-Download-Options noopen;
    add_header X-Permitted-Cross-Domain-Policies none;
    add_header Referrer-Policy no-referrer;

    # CUSTOM PARAM
    add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";


    #I found this header is needed on Ubuntu, but not on Arch Linux. 
    add_header X-Frame-Options "SAMEORIGIN";

    # Path to the root of your installation
    root /var/www/nextcloud/;

    access_log /var/log/nginx/nextcloud.access;
    error_log /var/log/nginx/nextcloud.error;

    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }

    # The following 2 rules are only needed for the user_webfinger app.
    # Uncomment it if you're planning to use this app.
    #rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
    #rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json
    # last;

    # The following rule is only needed for the Social app.
    # Uncomment it if you're planning to use this app.
    rewrite ^/.well-known/webfinger /public.php?service=webfinger last;

    location = /.well-known/webfinger {
      return 301 /index.php$uri;
    }

    location = /.well-known/carddav {
        return 301 $scheme://$host/remote.php/dav;
    }
    location = /.well-known/caldav {
       return 301 $scheme://$host/remote.php/dav;
    }

    location ~ /.well-known/acme-challenge {
      allow all;
    }

    location ^~ /.well-known {
          return 301 /index.php$uri;
    }


    # set max upload size
    client_max_body_size 512M;
    fastcgi_buffers 64 4K;

    # Disable gzip to avoid the removal of the ETag header
    gzip off;

    # Uncomment if your server is build with the ngx_pagespeed module
    # This module is currently not supported.
    #pagespeed off;

    error_page 403 /core/templates/403.php;
    error_page 404 /core/templates/404.php;

    location / {
       rewrite ^ /index.php;
    }

    location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)/ {
       deny all;
    }
    location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console) {
       deny all;
     }

    location ~ ^/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|ocs-provider/.+|core/templates/40[34])\.php(?:$|/) {
       include fastcgi_params;
       fastcgi_split_path_info ^(.+\.php)(/.*)$;
       try_files $fastcgi_script_name =404;
       fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
       fastcgi_param PATH_INFO $fastcgi_path_info;
       #Avoid sending the security headers twice
       fastcgi_param modHeadersAvailable true;
       fastcgi_param front_controller_active true;
       fastcgi_pass unix:/run/php/php7.4-fpm.sock;
       fastcgi_intercept_errors on;
       fastcgi_request_buffering off;

       #CUSTOM PARAM
       fastcgi_param PHP_VALUE "memory_limit = 2048M";
    }

    location ~ ^/(?:updater|ocs-provider)(?:$|/) {
       try_files $uri/ =404;
       index index.php;
    }

    # Adding the cache control header for js and css files
    # Make sure it is BELOW the PHP block
    location ~* \.(?:css|js)$ {
        try_files $uri /index.php$uri$is_args$args;
        add_header Cache-Control "public, max-age=7200";
        # Add headers to serve security related headers (It is intended to
        # have those duplicated to the ones above)
        add_header X-Content-Type-Options nosniff;
        add_header X-XSS-Protection "1; mode=block";
        add_header X-Robots-Tag none;
        add_header X-Download-Options noopen;
        add_header X-Permitted-Cross-Domain-Policies none;
        add_header Referrer-Policy no-referrer;
        # Optional: Don't log access to assets
        access_log off;
   }

   location ~* \.(?:svg|gif|png|html|ttf|woff|ico|jpg|jpeg)$ {
        try_files $uri /index.php$uri$is_args$args;
        # Optional: Don't log access to other assets
        access_log off;
   }
}

$ sudo certbot --nginx

$ cd /var/www/nextcloud/config/

<?php
$CONFIG = array (
  'passwordsalt' => 'dejaremplinepastoucher',
  'secret' => 'dejaremplinepastoucher',
  'trusted_domains' =>
  array (
    0 => '%YOURSERVERIP%',
    1 => '%maybeyoursubdomain.yourdomain.topleveldomain%',
  ),
  'datadirectory' => '/var/www/nextcloud/data',
  'dbtype' => 'pgsql',
  'version' => '24.0.5.1',
  //'overwrite.cli.url' => 'http://localhost',
  'overwrite.cli.url' => 'https://%maybeyoursubdomain.yourdomain.topleveldomain%',
  'dbname' => '%DBNAME%',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => '%DBUSER%',
  'dbpassword' => '%DBUSERPASSWORD%',
  'installed' => true,
  'instanceid' => 'dejaremplipastoucher',
  'filelocking.enabled' => true,
  'memcache.distributed' => '\OC\Memcache\Redis',
<------>'redis' => array(
<------>   'host' => 'localhost',
<------>   'port' => 6379,
<------>),
);

$ crontab -u www-data -e
$ */5  *  *  *  * php -f /var/www/nextcloud/cron.php

sudo -u www-data php /var/www/nextcloud/occ files:scan --all