Nextcloud problems / questions

nano /etc/nginx/sites-available/default

# /etc/nginx/sites-available/default
server {

        root /var/www;
        index index.php index.html index.htm index.nginx-debian.html;

        server_name YourDomain.com;

        include /etc/nginx/sites-dietpi/*.conf;

        location / {
                try_files $uri $uri/ =404;
        }

        location ~ \.php(?:$|/) {
                include snippets/fastcgi-php.conf;
                fastcgi_pass php;
        }

    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/YourDomain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/YourDomain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot


    ssl_trusted_certificate /etc/letsencrypt/live/YourDomain.com/chain.pem; # managed by Certbot
    ssl_stapling on; # managed by Certbot
    ssl_stapling_verify on; # managed by Certbot



    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always; # managed by Certbot



}

server {
    if ($host = YourDomain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


        listen 80 default_server;
        listen [::]:80 default_server;

        server_name YourDomain.com;
    return 404; # managed by Certbot


}


server {
    if ($host = YourDomain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot
    server_name nextcloud.YourDomain.com; # managed by Certbot
    return 404; # managed by Certbot




    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/nextcloud.YourDomain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/nextcloud.YourDomain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot



    add_header Strict-Transport-Security "max-age=31536000" always; # managed by Certbot


    ssl_trusted_certificate /etc/letsencrypt/live/nextcloud.YourDomain.com/chain.pem; # managed by Certbot
    ssl_stapling on; # managed by Certbot
    ssl_stapling_verify on; # managed by Certbot

}

server {
    if ($host = nextcloud.YourDomain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    if ($host = YourDomain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


        listen 80 ;
        listen [::]:80 ;
    server_name nextcloud.YourDomain.com; # managed by Certbot
    return 404; # managed by Certbot







}

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