function updatePost() {
    fetch(`/edit/${document.getElementById('id').value}`, {
        method: 'post',
        headers: {
            'Accept': 'application/json',
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({
            title: document.getElementById('title').value,
            content: document.getElementById('content').value
        })
    }).then(function(response) {
        console.log('tjena fixk');
    })
}