reverse_proxy to nextcloud

map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

server {
    server_name  <SERVER_NAME>;

    # Load configuration files for the default server block.
    include /etc/nginx/default.d/*.conf;

    #http2 on;                                 # uncomment to enable HTTP/2        - supported on nginx v1.25.1+
    #http3 on;                                 # uncomment to enable HTTP/3 / QUIC - supported on nginx v1.25.0+
    #quic_retry on;                            # uncomment to enable HTTP/3 / QUIC - supported on nginx v1.25.0+
    #add_header Alt-Svc 'h3=":443"; ma=86400'; # uncomment to enable HTTP/3 / QUIC - supported on nginx v1.25.0+
    #listen 443 quic reuseport;                # uncomment to enable HTTP/3 / QUIC - supported on nginx v1.25.0+

    location = /.well-known/carddav {
        return 301 $scheme://$host:$server_port/remote.php/dav;
    }
    location = /.well-known/caldav {
        return 301 $scheme://$host:$server_port/remote.php/dav;
    }
    location = /.well-known/openid-configuration {
        return 301 $scheme://$host:$server_port/index.php/apps/oidc/openid-configuration;
    }

    location / {
        proxy_pass <BACKEND_ADDR>;

        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host $http_host;

        #proxy_buffers 16 4k;
        #proxy_buffer_size 2k;
        proxy_busy_buffers_size   512k;
        proxy_buffers           4 512k;
        proxy_buffer_size         256k;

        client_body_buffer_size 512k;
        proxy_read_timeout 86400s;
        client_max_body_size 0;

        # Websocket
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;

        add_header Strict-Transport-Security "max-age=15552000; includeSubDomains; preload";
    }
    
    listen 443 ssl; # managed by Certbot
    ssl_certificate <SSL_CERT>; # managed by Certbot
    ssl_certificate_key <SSL_KEY>; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

server {
    server_name <SERVER_NAME>;

    listen 80;
    return 301 https://$host$request_uri;
}