Lycolog

<a href="https://example.com">
  <figure>
    <img src="https://example.com/foo.jpg" alt="" width="200">
    <figcaption>foo</figcaption>
  </figure>
</a>

function emb_test($atts) {
  $url = $atts["url"];
  $img = $atts["img"];
  $title = $atts["title"];

  return <<<EOD
<a href="$url>
  <figure>
    <img src="$img" alt="" width="200">
    <figcaption> $title </figcaption>
  </figure>
</a>

EOD;
}
add_shortcode('emb', 'emb_test');

function embed($atts) {
	$url = count($atts) > 0
	  ? $atts[0]
	  : "";
    $dom = new DOMDocument();

    $data = wp_remote_get($url);
    if (is_wp_error($data)) {
        return;
    }

    $html = $data['body'];
    $doc = new DOMDocument();
    @$doc->loadHTML($html);
    $metas = $doc->getElementsByTagName('meta');
    $title = '';
    $description = '';
    $image = '';
    foreach ($metas as $meta) {
        if ($meta->getAttribute('property') == 'og:title') {
            $title = $meta->getAttribute('content');
        }
        if ($meta->getAttribute('property') == 'og:description') {
            $description = $meta->getAttribute('content');
        }
        if ($meta->getAttribute('property') == 'og:image') {
            $image = $meta->getAttribute('content');
        }
    }
    if (!empty($title) && !empty($description)) {
		return <<<EOD
<a href="$url">
  <figure>
    <img src="$image" alt="$title">
    <figcaption>
    $title
    $description
    </figcaption>
  </figure>
</a>
EOD;
    }
}
add_shortcode('embed', 'embed');

wget https://github.com/mattermost/focalboard/releases/download/v0.15.0/focalboard-server-linux-amd64.tar.gz
tar -xvzf focalboard-server-linux-amd64.tar.gz
sudo mv focalboard /var/lib/

cat <<'EOF' | sudo tee /etc/nginx/conf.d/focalboard.conf
upstream focalboard {
   server localhost:15001;
   keepalive 32;
}

server {
   server_name  focalboard.test;
   access_log   /var/log/nginx/focalboard.access.log;
   error_log    /var/log/nginx/focalboard.error.log;

   location ~ /ws/* {
       proxy_set_header Upgrade $http_upgrade;
       proxy_set_header Connection "upgrade";
       client_max_body_size 50M;
       proxy_set_header Host $http_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-Frame-Options SAMEORIGIN;
       proxy_buffers 256 16k;
       proxy_buffer_size 16k;
       client_body_timeout 60;
       send_timeout 300;
       lingering_timeout 5;
       proxy_connect_timeout 1d;
       proxy_send_timeout 1d;
       proxy_read_timeout 1d;
       proxy_pass http://focalboard;
   }

   location / {
       client_max_body_size 50M;
       proxy_set_header Connection "";
       proxy_set_header Host $http_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-Frame-Options SAMEORIGIN;
       proxy_buffers 256 16k;
       proxy_buffer_size 16k;
       proxy_read_timeout 600s;
       proxy_cache_revalidate on;
       proxy_cache_min_uses 2;
       proxy_cache_use_stale timeout;
       proxy_cache_lock on;
       proxy_http_version 1.1;
       proxy_pass http://focalboard;
   }
}
EOF

sudo cat << 'EOF' | sudo tee /etc/init.d/focalboard
#!/bin/sh
## BEGIN INIT INFO
# Provides:          focalboard
# Required-Start:    $syslog $network
# Required-Stop:     $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: A self-hosted Git service written in Go.
# Description:       A self-hosted Git service written in Go.
## END INIT INFO

. /lib/lsb/init-functions

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin
DESC="Focalboard server"
NAME=focalboard
SERVICEVERBOSE=yes
PIDFILE=/run/$NAME.pid
STOP_SCHEDULE="${STOP_SCHEDULE:-QUIT/5/TERM/1/KILL/5}"

do_start()
{
    start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile \
        --background --chdir /var/lib/focalboard \
        --exec /var/lib/focalboard/bin/focalboard-server
}

do_stop()
{
    kill -9 $(cat /run/focalboard.pid)
    # does not work
    #start-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PIDFILE --name $NAME --oknodo
    rm -f $PIDFILE
}

do_status()
{
    if [ -f $PIDFILE ]; then
        if kill -0 $(cat "$PIDFILE"); then
            echo "$NAME is running, PID is $(cat $PIDFILE)"
        else
            echo "$NAME process is dead, but pidfile exists"
        fi
    else
        echo "$NAME is not running"
    fi
}

case "$1" in
    start)
        log_daemon_msg "Starting $DESC" "$NAME"
        do_start
        ;;
    stop)
        log_daemon_msg "Stopping $DESC" "$NAME"
        do_stop
        ;;
    status)
        do_status
        ;;
    restart)
        log_daemon_msg "Restarting $DESC" "$NAME"
        do_stop
        do_start
        ;;
    *)
        log_daemon_msg "Usage: $SCRIPTNAME {start|stop|status|restart}" >&2
        exit 2
        ;;
esac

exit 0
EOF

sudo chmod 755 /etc/init.d/focalboard
sudo update-rc.d focalboard defaults

mysql -u XXX -pYYY

CREATE DATABASE boards;
GRANT ALL on boards.* to 'boardsuser'@'localhost' identified by 'boardsuser-password';
exit

nano /var/lib/focalboard/config.json

    "port": 15001,
    "dbtype": "mysql",

sudo service focalboard start