Add this to your theme's functions.php

function add_dynamic_og_image() {
    if (!is_singular()) {
        return;
    }

    $permalink = get_permalink();
    if (!$permalink) {
        return;
    }

    $page_url = rawurlencode($permalink);
    $og_image_url = 'https://mosaic.praveenjuge.com/use?url=' . $page_url;

    echo '<meta property="og:image" content="' . esc_url($og_image_url) . '" />';
}
add_action('wp_head', 'add_dynamic_og_image');